SensorService.cpp revision 22b99e3a9a5797deada897102e71e9a88ae46d24
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), mSocketBufferSize(SOCKET_BUFFER_SIZE_NON_BATCHED), 70 mWakeLockAcquired(false) 71{ 72} 73 74void SensorService::onFirstRef() 75{ 76 ALOGD("nuSensorService starting..."); 77 78 SensorDevice& dev(SensorDevice::getInstance()); 79 80 if (dev.initCheck() == NO_ERROR) { 81 sensor_t const* list; 82 ssize_t count = dev.getSensorList(&list); 83 if (count > 0) { 84 ssize_t orientationIndex = -1; 85 bool hasGyro = false; 86 uint32_t virtualSensorsNeeds = 87 (1<<SENSOR_TYPE_GRAVITY) | 88 (1<<SENSOR_TYPE_LINEAR_ACCELERATION) | 89 (1<<SENSOR_TYPE_ROTATION_VECTOR); 90 91 mLastEventSeen.setCapacity(count); 92 for (ssize_t i=0 ; i<count ; i++) { 93 registerSensor( new HardwareSensor(list[i]) ); 94 switch (list[i].type) { 95 case SENSOR_TYPE_ORIENTATION: 96 orientationIndex = i; 97 break; 98 case SENSOR_TYPE_GYROSCOPE: 99 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 100 hasGyro = true; 101 break; 102 case SENSOR_TYPE_GRAVITY: 103 case SENSOR_TYPE_LINEAR_ACCELERATION: 104 case SENSOR_TYPE_ROTATION_VECTOR: 105 virtualSensorsNeeds &= ~(1<<list[i].type); 106 break; 107 } 108 } 109 110 // it's safe to instantiate the SensorFusion object here 111 // (it wants to be instantiated after h/w sensors have been 112 // registered) 113 const SensorFusion& fusion(SensorFusion::getInstance()); 114 115 // build the sensor list returned to users 116 mUserSensorList = mSensorList; 117 118 if (hasGyro) { 119 Sensor aSensor; 120 121 // Add Android virtual sensors if they're not already 122 // available in the HAL 123 124 aSensor = registerVirtualSensor( new RotationVectorSensor() ); 125 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) { 126 mUserSensorList.add(aSensor); 127 } 128 129 aSensor = registerVirtualSensor( new GravitySensor(list, count) ); 130 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_GRAVITY)) { 131 mUserSensorList.add(aSensor); 132 } 133 134 aSensor = registerVirtualSensor( new LinearAccelerationSensor(list, count) ); 135 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_LINEAR_ACCELERATION)) { 136 mUserSensorList.add(aSensor); 137 } 138 139 aSensor = registerVirtualSensor( new OrientationSensor() ); 140 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) { 141 // if we are doing our own rotation-vector, also add 142 // the orientation sensor and remove the HAL provided one. 143 mUserSensorList.replaceAt(aSensor, orientationIndex); 144 } 145 146 // virtual debugging sensors are not added to mUserSensorList 147 registerVirtualSensor( new CorrectedGyroSensor(list, count) ); 148 registerVirtualSensor( new GyroDriftSensor() ); 149 } 150 151 // debugging sensor list 152 mUserSensorListDebug = mSensorList; 153 154 // Check if the device really supports batching by looking at the FIFO event 155 // counts for each sensor. 156 bool batchingSupported = false; 157 for (int i = 0; i < mSensorList.size(); ++i) { 158 if (mSensorList[i].getFifoMaxEventCount() > 0) { 159 batchingSupported = true; 160 break; 161 } 162 } 163 164 if (batchingSupported) { 165 // Increase socket buffer size to a max of 100 KB for batching capabilities. 166 mSocketBufferSize = MAX_SOCKET_BUFFER_SIZE_BATCHED; 167 } else { 168 mSocketBufferSize = SOCKET_BUFFER_SIZE_NON_BATCHED; 169 } 170 171 // Compare the socketBufferSize value against the system limits and limit 172 // it to maxSystemSocketBufferSize if necessary. 173 FILE *fp = fopen("/proc/sys/net/core/wmem_max", "r"); 174 char line[128]; 175 if (fp != NULL && fgets(line, sizeof(line), fp) != NULL) { 176 line[sizeof(line) - 1] = '\0'; 177 size_t maxSystemSocketBufferSize; 178 sscanf(line, "%zu", &maxSystemSocketBufferSize); 179 if (mSocketBufferSize > maxSystemSocketBufferSize) { 180 mSocketBufferSize = maxSystemSocketBufferSize; 181 } 182 } 183 if (fp) { 184 fclose(fp); 185 } 186 187 mWakeLockAcquired = false; 188 mLooper = new Looper(false); 189 const size_t minBufferSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT; 190 mSensorEventBuffer = new sensors_event_t[minBufferSize]; 191 mSensorEventScratch = new sensors_event_t[minBufferSize]; 192 mMapFlushEventsToConnections = new SensorEventConnection const * [minBufferSize]; 193 194 mAckReceiver = new SensorEventAckReceiver(this); 195 mAckReceiver->run("SensorEventAckReceiver", PRIORITY_URGENT_DISPLAY); 196 mInitCheck = NO_ERROR; 197 run("SensorService", PRIORITY_URGENT_DISPLAY); 198 } 199 } 200} 201 202Sensor SensorService::registerSensor(SensorInterface* s) 203{ 204 sensors_event_t event; 205 memset(&event, 0, sizeof(event)); 206 207 const Sensor sensor(s->getSensor()); 208 // add to the sensor list (returned to clients) 209 mSensorList.add(sensor); 210 // add to our handle->SensorInterface mapping 211 mSensorMap.add(sensor.getHandle(), s); 212 // create an entry in the mLastEventSeen array 213 mLastEventSeen.add(sensor.getHandle(), event); 214 215 return sensor; 216} 217 218Sensor SensorService::registerVirtualSensor(SensorInterface* s) 219{ 220 Sensor sensor = registerSensor(s); 221 mVirtualSensorList.add( s ); 222 return sensor; 223} 224 225SensorService::~SensorService() 226{ 227 for (size_t i=0 ; i<mSensorMap.size() ; i++) 228 delete mSensorMap.valueAt(i); 229} 230 231static const String16 sDump("android.permission.DUMP"); 232 233status_t SensorService::dump(int fd, const Vector<String16>& /*args*/) 234{ 235 String8 result; 236 if (!PermissionCache::checkCallingPermission(sDump)) { 237 result.appendFormat("Permission Denial: " 238 "can't dump SensorService from pid=%d, uid=%d\n", 239 IPCThreadState::self()->getCallingPid(), 240 IPCThreadState::self()->getCallingUid()); 241 } else { 242 Mutex::Autolock _l(mLock); 243 result.append("Sensor List:\n"); 244 for (size_t i=0 ; i<mSensorList.size() ; i++) { 245 const Sensor& s(mSensorList[i]); 246 const sensors_event_t& e(mLastEventSeen.valueFor(s.getHandle())); 247 result.appendFormat( 248 "%-15s| %-10s| version=%d |%-20s| 0x%08x | \"%s\" | type=%d |", 249 s.getName().string(), 250 s.getVendor().string(), 251 s.getVersion(), 252 s.getStringType().string(), 253 s.getHandle(), 254 s.getRequiredPermission().string(), 255 s.getType()); 256 257 const int reportingMode = s.getReportingMode(); 258 if (reportingMode == AREPORTING_MODE_CONTINUOUS) { 259 result.append(" continuous | "); 260 } else if (reportingMode == AREPORTING_MODE_ON_CHANGE) { 261 result.append(" on-change | "); 262 } else if (reportingMode == AREPORTING_MODE_ONE_SHOT) { 263 result.append(" one-shot | "); 264 } else { 265 result.append(" special-trigger | "); 266 } 267 268 if (s.getMaxDelay() > 0) { 269 result.appendFormat("minRate=%.2fHz | ", 1e6f / s.getMaxDelay()); 270 } else { 271 result.appendFormat("maxDelay=%dus |", s.getMaxDelay()); 272 } 273 274 if (s.getMinDelay() > 0) { 275 result.appendFormat("maxRate=%.2fHz | ", 1e6f / s.getMinDelay()); 276 } else { 277 result.appendFormat("minDelay=%dus |", s.getMinDelay()); 278 } 279 280 if (s.getFifoMaxEventCount() > 0) { 281 result.appendFormat("FifoMax=%d events | ", 282 s.getFifoMaxEventCount()); 283 } else { 284 result.append("no batching | "); 285 } 286 287 if (s.isWakeUpSensor()) { 288 result.appendFormat("wakeUp | "); 289 } else { 290 result.appendFormat("non-wakeUp | "); 291 } 292 293 switch (s.getType()) { 294 case SENSOR_TYPE_ROTATION_VECTOR: 295 case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR: 296 result.appendFormat( 297 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 298 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.timestamp); 299 break; 300 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED: 301 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 302 result.appendFormat( 303 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 304 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.data[5], 305 e.timestamp); 306 break; 307 case SENSOR_TYPE_GAME_ROTATION_VECTOR: 308 result.appendFormat( 309 "last=<%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 310 e.data[0], e.data[1], e.data[2], e.data[3], e.timestamp); 311 break; 312 case SENSOR_TYPE_SIGNIFICANT_MOTION: 313 case SENSOR_TYPE_STEP_DETECTOR: 314 result.appendFormat( "last=<%f %" PRId64 ">\n", e.data[0], e.timestamp); 315 break; 316 case SENSOR_TYPE_STEP_COUNTER: 317 result.appendFormat( "last=<%" PRIu64 ", %" PRId64 ">\n", e.u64.step_counter, 318 e.timestamp); 319 break; 320 default: 321 // default to 3 values 322 result.appendFormat( 323 "last=<%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 324 e.data[0], e.data[1], e.data[2], e.timestamp); 325 break; 326 } 327 result.append("\n"); 328 } 329 SensorFusion::getInstance().dump(result); 330 SensorDevice::getInstance().dump(result); 331 332 result.append("Active sensors:\n"); 333 for (size_t i=0 ; i<mActiveSensors.size() ; i++) { 334 int handle = mActiveSensors.keyAt(i); 335 result.appendFormat("%s (handle=0x%08x, connections=%zu)\n", 336 getSensorName(handle).string(), 337 handle, 338 mActiveSensors.valueAt(i)->getNumConnections()); 339 } 340 341 result.appendFormat("Socket Buffer size = %d events\n", 342 mSocketBufferSize/sizeof(sensors_event_t)); 343 result.appendFormat("WakeLock Status: %s \n", mWakeLockAcquired ? "acquired" : "not held"); 344 result.appendFormat("%zd active connections\n", mActiveConnections.size()); 345 346 for (size_t i=0 ; i < mActiveConnections.size() ; i++) { 347 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 348 if (connection != 0) { 349 result.appendFormat("Connection Number: %zu \n", i); 350 connection->dump(result); 351 } 352 } 353 } 354 write(fd, result.string(), result.size()); 355 return NO_ERROR; 356} 357 358void SensorService::cleanupAutoDisabledSensorLocked(const sp<SensorEventConnection>& connection, 359 sensors_event_t const* buffer, const int count) { 360 for (int i=0 ; i<count ; i++) { 361 int handle = buffer[i].sensor; 362 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 363 handle = buffer[i].meta_data.sensor; 364 } 365 if (connection->hasSensor(handle)) { 366 SensorInterface* sensor = mSensorMap.valueFor(handle); 367 // If this buffer has an event from a one_shot sensor and this connection is registered 368 // for this particular one_shot sensor, try cleaning up the connection. 369 if (sensor != NULL && 370 sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 371 sensor->autoDisable(connection.get(), handle); 372 cleanupWithoutDisableLocked(connection, handle); 373 } 374 } 375 } 376} 377 378bool SensorService::threadLoop() 379{ 380 ALOGD("nuSensorService thread starting..."); 381 382 // each virtual sensor could generate an event per "real" event, that's why we need 383 // to size numEventMax much smaller than MAX_RECEIVE_BUFFER_EVENT_COUNT. 384 // in practice, this is too aggressive, but guaranteed to be enough. 385 const size_t minBufferSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT; 386 const size_t numEventMax = minBufferSize / (1 + mVirtualSensorList.size()); 387 388 SensorDevice& device(SensorDevice::getInstance()); 389 const size_t vcount = mVirtualSensorList.size(); 390 391 const int halVersion = device.getHalDeviceVersion(); 392 do { 393 ssize_t count = device.poll(mSensorEventBuffer, numEventMax); 394 if (count < 0) { 395 ALOGE("sensor poll failed (%s)", strerror(-count)); 396 break; 397 } 398 399 // Reset sensors_event_t.flags to zero for all events in the buffer. 400 for (int i = 0; i < count; i++) { 401 mSensorEventBuffer[i].flags = 0; 402 } 403 404 // Make a copy of the connection vector as some connections may be removed during the 405 // course of this loop (especially when one-shot sensor events are present in the 406 // sensor_event buffer). Promote all connections to StrongPointers before the lock is 407 // acquired. If the destructor of the sp gets called when the lock is acquired, it may 408 // result in a deadlock as ~SensorEventConnection() needs to acquire mLock again for 409 // cleanup. So copy all the strongPointers to a vector before the lock is acquired. 410 SortedVector< sp<SensorEventConnection> > activeConnections; 411 populateActiveConnections(&activeConnections); 412 Mutex::Autolock _l(mLock); 413 // Poll has returned. Hold a wakelock if one of the events is from a wake up sensor. The 414 // rest of this loop is under a critical section protected by mLock. Acquiring a wakeLock, 415 // sending events to clients (incrementing SensorEventConnection::mWakeLockRefCount) should 416 // not be interleaved with decrementing SensorEventConnection::mWakeLockRefCount and 417 // releasing the wakelock. 418 bool bufferHasWakeUpEvent = false; 419 for (int i = 0; i < count; i++) { 420 if (isWakeUpSensorEvent(mSensorEventBuffer[i])) { 421 bufferHasWakeUpEvent = true; 422 break; 423 } 424 } 425 426 if (bufferHasWakeUpEvent && !mWakeLockAcquired) { 427 setWakeLockAcquiredLocked(true); 428 } 429 recordLastValueLocked(mSensorEventBuffer, count); 430 431 // handle virtual sensors 432 if (count && vcount) { 433 sensors_event_t const * const event = mSensorEventBuffer; 434 const size_t activeVirtualSensorCount = mActiveVirtualSensors.size(); 435 if (activeVirtualSensorCount) { 436 size_t k = 0; 437 SensorFusion& fusion(SensorFusion::getInstance()); 438 if (fusion.isEnabled()) { 439 for (size_t i=0 ; i<size_t(count) ; i++) { 440 fusion.process(event[i]); 441 } 442 } 443 for (size_t i=0 ; i<size_t(count) && k<minBufferSize ; i++) { 444 for (size_t j=0 ; j<activeVirtualSensorCount ; j++) { 445 if (count + k >= minBufferSize) { 446 ALOGE("buffer too small to hold all events: " 447 "count=%zd, k=%zu, size=%zu", 448 count, k, minBufferSize); 449 break; 450 } 451 sensors_event_t out; 452 SensorInterface* si = mActiveVirtualSensors.valueAt(j); 453 if (si->process(&out, event[i])) { 454 mSensorEventBuffer[count + k] = out; 455 k++; 456 } 457 } 458 } 459 if (k) { 460 // record the last synthesized values 461 recordLastValueLocked(&mSensorEventBuffer[count], k); 462 count += k; 463 // sort the buffer by time-stamps 464 sortEventBuffer(mSensorEventBuffer, count); 465 } 466 } 467 } 468 469 // handle backward compatibility for RotationVector sensor 470 if (halVersion < SENSORS_DEVICE_API_VERSION_1_0) { 471 for (int i = 0; i < count; i++) { 472 if (mSensorEventBuffer[i].type == SENSOR_TYPE_ROTATION_VECTOR) { 473 // All the 4 components of the quaternion should be available 474 // No heading accuracy. Set it to -1 475 mSensorEventBuffer[i].data[4] = -1; 476 } 477 } 478 } 479 480 // Map flush_complete_events in the buffer to SensorEventConnections which called 481 // flush on the hardware sensor. mapFlushEventsToConnections[i] will be the 482 // SensorEventConnection mapped to the corresponding flush_complete_event in 483 // mSensorEventBuffer[i] if such a mapping exists (NULL otherwise). 484 for (int i = 0; i < count; ++i) { 485 mMapFlushEventsToConnections[i] = NULL; 486 if (mSensorEventBuffer[i].type == SENSOR_TYPE_META_DATA) { 487 const int sensor_handle = mSensorEventBuffer[i].meta_data.sensor; 488 SensorRecord* rec = mActiveSensors.valueFor(sensor_handle); 489 if (rec != NULL) { 490 mMapFlushEventsToConnections[i] = rec->getFirstPendingFlushConnection(); 491 rec->removeFirstPendingFlushConnection(); 492 } 493 } 494 } 495 496 // Send our events to clients. Check the state of wake lock for each client and release the 497 // lock if none of the clients need it. 498 bool needsWakeLock = false; 499 size_t numConnections = activeConnections.size(); 500 for (size_t i=0 ; i < numConnections; ++i) { 501 if (activeConnections[i] != 0) { 502 activeConnections[i]->sendEvents(mSensorEventBuffer, count, mSensorEventScratch, 503 mMapFlushEventsToConnections); 504 needsWakeLock |= activeConnections[i]->needsWakeLock(); 505 // If the connection has one-shot sensors, it may be cleaned up after first trigger. 506 // Early check for one-shot sensors. 507 if (activeConnections[i]->hasOneShotSensors()) { 508 cleanupAutoDisabledSensorLocked(activeConnections[i], mSensorEventBuffer, 509 count); 510 } 511 } 512 } 513 514 if (mWakeLockAcquired && !needsWakeLock) { 515 setWakeLockAcquiredLocked(false); 516 } 517 } while (!Thread::exitPending()); 518 519 ALOGW("Exiting SensorService::threadLoop => aborting..."); 520 abort(); 521 return false; 522} 523 524sp<Looper> SensorService::getLooper() const { 525 return mLooper; 526} 527 528void SensorService::resetAllWakeLockRefCounts() { 529 SortedVector< sp<SensorEventConnection> > activeConnections; 530 populateActiveConnections(&activeConnections); 531 { 532 Mutex::Autolock _l(mLock); 533 for (size_t i=0 ; i < activeConnections.size(); ++i) { 534 if (activeConnections[i] != 0) { 535 activeConnections[i]->resetWakeLockRefCount(); 536 } 537 } 538 setWakeLockAcquiredLocked(false); 539 } 540} 541 542void SensorService::setWakeLockAcquiredLocked(bool acquire) { 543 if (acquire) { 544 if (!mWakeLockAcquired) { 545 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 546 mWakeLockAcquired = true; 547 } 548 mLooper->wake(); 549 } else { 550 if (mWakeLockAcquired) { 551 release_wake_lock(WAKE_LOCK_NAME); 552 mWakeLockAcquired = false; 553 } 554 } 555} 556 557 558bool SensorService::isWakeLockAcquired() { 559 Mutex::Autolock _l(mLock); 560 return mWakeLockAcquired; 561} 562 563bool SensorService::SensorEventAckReceiver::threadLoop() { 564 ALOGD("new thread SensorEventAckReceiver"); 565 sp<Looper> looper = mService->getLooper(); 566 do { 567 bool wakeLockAcquired = mService->isWakeLockAcquired(); 568 int timeout = -1; 569 if (wakeLockAcquired) timeout = 5000; 570 int ret = looper->pollOnce(timeout); 571 if (ret == ALOOPER_POLL_TIMEOUT) { 572 mService->resetAllWakeLockRefCounts(); 573 } 574 } while(!Thread::exitPending()); 575 return false; 576} 577 578void SensorService::recordLastValueLocked( 579 const sensors_event_t* buffer, size_t count) { 580 const sensors_event_t* last = NULL; 581 for (size_t i = 0; i < count; i++) { 582 const sensors_event_t* event = &buffer[i]; 583 if (event->type != SENSOR_TYPE_META_DATA) { 584 if (last && event->sensor != last->sensor) { 585 mLastEventSeen.editValueFor(last->sensor) = *last; 586 } 587 last = event; 588 } 589 } 590 if (last) { 591 mLastEventSeen.editValueFor(last->sensor) = *last; 592 } 593} 594 595void SensorService::sortEventBuffer(sensors_event_t* buffer, size_t count) 596{ 597 struct compar { 598 static int cmp(void const* lhs, void const* rhs) { 599 sensors_event_t const* l = static_cast<sensors_event_t const*>(lhs); 600 sensors_event_t const* r = static_cast<sensors_event_t const*>(rhs); 601 return l->timestamp - r->timestamp; 602 } 603 }; 604 qsort(buffer, count, sizeof(sensors_event_t), compar::cmp); 605} 606 607String8 SensorService::getSensorName(int handle) const { 608 size_t count = mUserSensorList.size(); 609 for (size_t i=0 ; i<count ; i++) { 610 const Sensor& sensor(mUserSensorList[i]); 611 if (sensor.getHandle() == handle) { 612 return sensor.getName(); 613 } 614 } 615 String8 result("unknown"); 616 return result; 617} 618 619bool SensorService::isVirtualSensor(int handle) const { 620 SensorInterface* sensor = mSensorMap.valueFor(handle); 621 return sensor->isVirtual(); 622} 623 624bool SensorService::isWakeUpSensorEvent(const sensors_event_t& event) const { 625 int handle = event.sensor; 626 if (event.type == SENSOR_TYPE_META_DATA) { 627 handle = event.meta_data.sensor; 628 } 629 SensorInterface* sensor = mSensorMap.valueFor(handle); 630 return sensor != NULL && sensor->getSensor().isWakeUpSensor(); 631} 632 633 634SensorService::SensorRecord * SensorService::getSensorRecord(int handle) { 635 return mActiveSensors.valueFor(handle); 636} 637 638Vector<Sensor> SensorService::getSensorList() 639{ 640 char value[PROPERTY_VALUE_MAX]; 641 property_get("debug.sensors", value, "0"); 642 const Vector<Sensor>& initialSensorList = (atoi(value)) ? 643 mUserSensorListDebug : mUserSensorList; 644 Vector<Sensor> accessibleSensorList; 645 for (size_t i = 0; i < initialSensorList.size(); i++) { 646 Sensor sensor = initialSensorList[i]; 647 if (canAccessSensor(sensor)) { 648 accessibleSensorList.add(sensor); 649 } else { 650 ALOGI("Skipped sensor %s because it requires permission %s", 651 sensor.getName().string(), 652 sensor.getRequiredPermission().string()); 653 } 654 } 655 return accessibleSensorList; 656} 657 658sp<ISensorEventConnection> SensorService::createSensorEventConnection() 659{ 660 uid_t uid = IPCThreadState::self()->getCallingUid(); 661 sp<SensorEventConnection> result(new SensorEventConnection(this, uid)); 662 return result; 663} 664 665void SensorService::cleanupConnection(SensorEventConnection* c) 666{ 667 Mutex::Autolock _l(mLock); 668 const wp<SensorEventConnection> connection(c); 669 size_t size = mActiveSensors.size(); 670 ALOGD_IF(DEBUG_CONNECTIONS, "%zu active sensors", size); 671 for (size_t i=0 ; i<size ; ) { 672 int handle = mActiveSensors.keyAt(i); 673 if (c->hasSensor(handle)) { 674 ALOGD_IF(DEBUG_CONNECTIONS, "%zu: disabling handle=0x%08x", i, handle); 675 SensorInterface* sensor = mSensorMap.valueFor( handle ); 676 ALOGE_IF(!sensor, "mSensorMap[handle=0x%08x] is null!", handle); 677 if (sensor) { 678 sensor->activate(c, false); 679 } 680 c->removeSensor(handle); 681 } 682 SensorRecord* rec = mActiveSensors.valueAt(i); 683 ALOGE_IF(!rec, "mActiveSensors[%zu] is null (handle=0x%08x)!", i, handle); 684 ALOGD_IF(DEBUG_CONNECTIONS, 685 "removing connection %p for sensor[%zu].handle=0x%08x", 686 c, i, handle); 687 688 if (rec && rec->removeConnection(connection)) { 689 ALOGD_IF(DEBUG_CONNECTIONS, "... and it was the last connection"); 690 mActiveSensors.removeItemsAt(i, 1); 691 mActiveVirtualSensors.removeItem(handle); 692 delete rec; 693 size--; 694 } else { 695 i++; 696 } 697 } 698 c->updateLooperRegistration(mLooper); 699 mActiveConnections.remove(connection); 700 BatteryService::cleanup(c->getUid()); 701 if (c->needsWakeLock()) { 702 checkWakeLockStateLocked(); 703 } 704} 705 706Sensor SensorService::getSensorFromHandle(int handle) const { 707 return mSensorMap.valueFor(handle)->getSensor(); 708} 709 710status_t SensorService::enable(const sp<SensorEventConnection>& connection, 711 int handle, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, int reservedFlags) 712{ 713 if (mInitCheck != NO_ERROR) 714 return mInitCheck; 715 716 SensorInterface* sensor = mSensorMap.valueFor(handle); 717 if (sensor == NULL) { 718 return BAD_VALUE; 719 } 720 721 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried enabling")) { 722 return BAD_VALUE; 723 } 724 725 Mutex::Autolock _l(mLock); 726 SensorRecord* rec = mActiveSensors.valueFor(handle); 727 if (rec == 0) { 728 rec = new SensorRecord(connection); 729 mActiveSensors.add(handle, rec); 730 if (sensor->isVirtual()) { 731 mActiveVirtualSensors.add(handle, sensor); 732 } 733 } else { 734 if (rec->addConnection(connection)) { 735 // this sensor is already activated, but we are adding a connection that uses it. 736 // Immediately send down the last known value of the requested sensor if it's not a 737 // "continuous" sensor. 738 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ON_CHANGE) { 739 // NOTE: The wake_up flag of this event may get set to 740 // WAKE_UP_SENSOR_EVENT_NEEDS_ACK if this is a wake_up event. 741 sensors_event_t& event(mLastEventSeen.editValueFor(handle)); 742 if (event.version == sizeof(sensors_event_t)) { 743 if (isWakeUpSensorEvent(event) && !mWakeLockAcquired) { 744 setWakeLockAcquiredLocked(true); 745 } 746 connection->sendEvents(&event, 1, NULL); 747 if (!connection->needsWakeLock() && mWakeLockAcquired) { 748 checkWakeLockStateLocked(); 749 } 750 } 751 } 752 } 753 } 754 755 if (connection->addSensor(handle)) { 756 BatteryService::enableSensor(connection->getUid(), handle); 757 // the sensor was added (which means it wasn't already there) 758 // so, see if this connection becomes active 759 if (mActiveConnections.indexOf(connection) < 0) { 760 mActiveConnections.add(connection); 761 } 762 } else { 763 ALOGW("sensor %08x already enabled in connection %p (ignoring)", 764 handle, connection.get()); 765 } 766 767 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 768 if (samplingPeriodNs < minDelayNs) { 769 samplingPeriodNs = minDelayNs; 770 } 771 772 ALOGD_IF(DEBUG_CONNECTIONS, "Calling batch handle==%d flags=%d" 773 "rate=%" PRId64 " timeout== %" PRId64"", 774 handle, reservedFlags, samplingPeriodNs, maxBatchReportLatencyNs); 775 776 status_t err = sensor->batch(connection.get(), handle, reservedFlags, samplingPeriodNs, 777 maxBatchReportLatencyNs); 778 779 // Call flush() before calling activate() on the sensor. Wait for a first flush complete 780 // event before sending events on this connection. Ignore one-shot sensors which don't 781 // support flush(). Also if this sensor isn't already active, don't call flush(). 782 if (err == NO_ERROR && sensor->getSensor().getReportingMode() != AREPORTING_MODE_ONE_SHOT && 783 rec->getNumConnections() > 1) { 784 connection->setFirstFlushPending(handle, true); 785 status_t err_flush = sensor->flush(connection.get(), handle); 786 // Flush may return error if the underlying h/w sensor uses an older HAL. 787 if (err_flush == NO_ERROR) { 788 rec->addPendingFlushConnection(connection.get()); 789 } else { 790 connection->setFirstFlushPending(handle, false); 791 } 792 } 793 794 if (err == NO_ERROR) { 795 ALOGD_IF(DEBUG_CONNECTIONS, "Calling activate on %d", handle); 796 err = sensor->activate(connection.get(), true); 797 } 798 799 if (err == NO_ERROR) { 800 connection->updateLooperRegistration(mLooper); 801 } 802 803 if (err != NO_ERROR) { 804 // batch/activate has failed, reset our state. 805 cleanupWithoutDisableLocked(connection, handle); 806 } 807 return err; 808} 809 810status_t SensorService::disable(const sp<SensorEventConnection>& connection, 811 int handle) 812{ 813 if (mInitCheck != NO_ERROR) 814 return mInitCheck; 815 816 Mutex::Autolock _l(mLock); 817 status_t err = cleanupWithoutDisableLocked(connection, handle); 818 if (err == NO_ERROR) { 819 SensorInterface* sensor = mSensorMap.valueFor(handle); 820 err = sensor ? sensor->activate(connection.get(), false) : status_t(BAD_VALUE); 821 } 822 return err; 823} 824 825status_t SensorService::cleanupWithoutDisable( 826 const sp<SensorEventConnection>& connection, int handle) { 827 Mutex::Autolock _l(mLock); 828 return cleanupWithoutDisableLocked(connection, handle); 829} 830 831status_t SensorService::cleanupWithoutDisableLocked( 832 const sp<SensorEventConnection>& connection, int handle) { 833 SensorRecord* rec = mActiveSensors.valueFor(handle); 834 if (rec) { 835 // see if this connection becomes inactive 836 if (connection->removeSensor(handle)) { 837 BatteryService::disableSensor(connection->getUid(), handle); 838 } 839 if (connection->hasAnySensor() == false) { 840 connection->updateLooperRegistration(mLooper); 841 mActiveConnections.remove(connection); 842 } 843 // see if this sensor becomes inactive 844 if (rec->removeConnection(connection)) { 845 mActiveSensors.removeItem(handle); 846 mActiveVirtualSensors.removeItem(handle); 847 delete rec; 848 } 849 return NO_ERROR; 850 } 851 return BAD_VALUE; 852} 853 854status_t SensorService::setEventRate(const sp<SensorEventConnection>& connection, 855 int handle, nsecs_t ns) 856{ 857 if (mInitCheck != NO_ERROR) 858 return mInitCheck; 859 860 SensorInterface* sensor = mSensorMap.valueFor(handle); 861 if (!sensor) 862 return BAD_VALUE; 863 864 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried configuring")) { 865 return BAD_VALUE; 866 } 867 868 if (ns < 0) 869 return BAD_VALUE; 870 871 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 872 if (ns < minDelayNs) { 873 ns = minDelayNs; 874 } 875 876 return sensor->setDelay(connection.get(), handle, ns); 877} 878 879status_t SensorService::flushSensor(const sp<SensorEventConnection>& connection) { 880 if (mInitCheck != NO_ERROR) return mInitCheck; 881 SensorDevice& dev(SensorDevice::getInstance()); 882 const int halVersion = dev.getHalDeviceVersion(); 883 status_t err(NO_ERROR); 884 Mutex::Autolock _l(mLock); 885 // Loop through all sensors for this connection and call flush on each of them. 886 for (size_t i = 0; i < connection->mSensorInfo.size(); ++i) { 887 const int handle = connection->mSensorInfo.keyAt(i); 888 SensorInterface* sensor = mSensorMap.valueFor(handle); 889 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 890 ALOGE("flush called on a one-shot sensor"); 891 err = INVALID_OPERATION; 892 continue; 893 } 894 if (halVersion <= SENSORS_DEVICE_API_VERSION_1_0 || isVirtualSensor(handle)) { 895 // For older devices just increment pending flush count which will send a trivial 896 // flush complete event. 897 connection->incrementPendingFlushCount(handle); 898 } else { 899 status_t err_flush = sensor->flush(connection.get(), handle); 900 if (err_flush == NO_ERROR) { 901 SensorRecord* rec = mActiveSensors.valueFor(handle); 902 if (rec != NULL) rec->addPendingFlushConnection(connection); 903 } 904 err = (err_flush != NO_ERROR) ? err_flush : err; 905 } 906 } 907 return err; 908} 909 910bool SensorService::canAccessSensor(const Sensor& sensor) { 911 return (sensor.getRequiredPermission().isEmpty()) || 912 PermissionCache::checkCallingPermission(String16(sensor.getRequiredPermission())); 913} 914 915bool SensorService::verifyCanAccessSensor(const Sensor& sensor, const char* operation) { 916 if (canAccessSensor(sensor)) { 917 return true; 918 } else { 919 String8 errorMessage; 920 errorMessage.appendFormat( 921 "%s a sensor (%s) without holding its required permission: %s", 922 operation, 923 sensor.getName().string(), 924 sensor.getRequiredPermission().string()); 925 return false; 926 } 927} 928 929void SensorService::checkWakeLockState() { 930 Mutex::Autolock _l(mLock); 931 checkWakeLockStateLocked(); 932} 933 934void SensorService::checkWakeLockStateLocked() { 935 if (!mWakeLockAcquired) { 936 return; 937 } 938 bool releaseLock = true; 939 for (size_t i=0 ; i<mActiveConnections.size() ; i++) { 940 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 941 if (connection != 0) { 942 if (connection->needsWakeLock()) { 943 releaseLock = false; 944 break; 945 } 946 } 947 } 948 if (releaseLock) { 949 setWakeLockAcquiredLocked(false); 950 } 951} 952 953void SensorService::sendEventsFromCache(const sp<SensorEventConnection>& connection) { 954 Mutex::Autolock _l(mLock); 955 connection->writeToSocketFromCache(); 956 if (connection->needsWakeLock()) { 957 setWakeLockAcquiredLocked(true); 958 } 959} 960 961void SensorService::populateActiveConnections( 962 SortedVector< sp<SensorEventConnection> >* activeConnections) { 963 Mutex::Autolock _l(mLock); 964 for (size_t i=0 ; i < mActiveConnections.size(); ++i) { 965 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 966 if (connection != 0) { 967 activeConnections->add(connection); 968 } 969 } 970} 971 972// --------------------------------------------------------------------------- 973SensorService::SensorRecord::SensorRecord( 974 const sp<SensorEventConnection>& connection) 975{ 976 mConnections.add(connection); 977} 978 979bool SensorService::SensorRecord::addConnection( 980 const sp<SensorEventConnection>& connection) 981{ 982 if (mConnections.indexOf(connection) < 0) { 983 mConnections.add(connection); 984 return true; 985 } 986 return false; 987} 988 989bool SensorService::SensorRecord::removeConnection( 990 const wp<SensorEventConnection>& connection) 991{ 992 ssize_t index = mConnections.indexOf(connection); 993 if (index >= 0) { 994 mConnections.removeItemsAt(index, 1); 995 } 996 // Remove this connections from the queue of flush() calls made on this sensor. 997 for (Vector< wp<SensorEventConnection> >::iterator it = 998 mPendingFlushConnections.begin(); it != mPendingFlushConnections.end();) { 999 1000 if (it->unsafe_get() == connection.unsafe_get()) { 1001 it = mPendingFlushConnections.erase(it); 1002 } else { 1003 ++it; 1004 } 1005 } 1006 return mConnections.size() ? false : true; 1007} 1008 1009void SensorService::SensorRecord::addPendingFlushConnection( 1010 const sp<SensorEventConnection>& connection) { 1011 mPendingFlushConnections.add(connection); 1012} 1013 1014void SensorService::SensorRecord::removeFirstPendingFlushConnection() { 1015 if (mPendingFlushConnections.size() > 0) { 1016 mPendingFlushConnections.removeAt(0); 1017 } 1018} 1019 1020SensorService::SensorEventConnection * 1021SensorService::SensorRecord::getFirstPendingFlushConnection() { 1022 if (mPendingFlushConnections.size() > 0) { 1023 return mPendingFlushConnections[0].unsafe_get(); 1024 } 1025 return NULL; 1026} 1027 1028// --------------------------------------------------------------------------- 1029 1030SensorService::SensorEventConnection::SensorEventConnection( 1031 const sp<SensorService>& service, uid_t uid) 1032 : mService(service), mUid(uid), mWakeLockRefCount(0), mHasLooperCallbacks(false), 1033 mDead(false), mEventCache(NULL), mCacheSize(0), mMaxCacheSize(0) { 1034 mChannel = new BitTube(mService->mSocketBufferSize); 1035#if DEBUG_CONNECTIONS 1036 mEventsReceived = mEventsSentFromCache = mEventsSent = 0; 1037 mTotalAcksNeeded = mTotalAcksReceived = 0; 1038#endif 1039} 1040 1041SensorService::SensorEventConnection::~SensorEventConnection() { 1042 ALOGD_IF(DEBUG_CONNECTIONS, "~SensorEventConnection(%p)", this); 1043 mService->cleanupConnection(this); 1044 if (mEventCache != NULL) { 1045 delete mEventCache; 1046 } 1047} 1048 1049void SensorService::SensorEventConnection::onFirstRef() { 1050 LooperCallback::onFirstRef(); 1051} 1052 1053bool SensorService::SensorEventConnection::needsWakeLock() { 1054 Mutex::Autolock _l(mConnectionLock); 1055 return !mDead && mWakeLockRefCount > 0; 1056} 1057 1058void SensorService::SensorEventConnection::resetWakeLockRefCount() { 1059 Mutex::Autolock _l(mConnectionLock); 1060 mWakeLockRefCount = 0; 1061} 1062 1063void SensorService::SensorEventConnection::dump(String8& result) { 1064 Mutex::Autolock _l(mConnectionLock); 1065 result.appendFormat("\t WakeLockRefCount %d | uid %d | cache size %d | max cache size %d\n", 1066 mWakeLockRefCount, mUid, mCacheSize, mMaxCacheSize); 1067 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1068 const FlushInfo& flushInfo = mSensorInfo.valueAt(i); 1069 result.appendFormat("\t %s 0x%08x | status: %s | pending flush events %d \n", 1070 mService->getSensorName(mSensorInfo.keyAt(i)).string(), 1071 mSensorInfo.keyAt(i), 1072 flushInfo.mFirstFlushPending ? "First flush pending" : 1073 "active", 1074 flushInfo.mPendingFlushEventsToSend); 1075 } 1076#if DEBUG_CONNECTIONS 1077 result.appendFormat("\t events recvd: %d | sent %d | cache %d | dropped %d |" 1078 " total_acks_needed %d | total_acks_recvd %d\n", 1079 mEventsReceived, 1080 mEventsSent, 1081 mEventsSentFromCache, 1082 mEventsReceived - (mEventsSentFromCache + mEventsSent + mCacheSize), 1083 mTotalAcksNeeded, 1084 mTotalAcksReceived); 1085#endif 1086} 1087 1088bool SensorService::SensorEventConnection::addSensor(int32_t handle) { 1089 Mutex::Autolock _l(mConnectionLock); 1090 if (!verifyCanAccessSensor(mService->getSensorFromHandle(handle), "Tried adding")) { 1091 return false; 1092 } 1093 if (mSensorInfo.indexOfKey(handle) < 0) { 1094 mSensorInfo.add(handle, FlushInfo()); 1095 return true; 1096 } 1097 return false; 1098} 1099 1100bool SensorService::SensorEventConnection::removeSensor(int32_t handle) { 1101 Mutex::Autolock _l(mConnectionLock); 1102 if (mSensorInfo.removeItem(handle) >= 0) { 1103 return true; 1104 } 1105 return false; 1106} 1107 1108bool SensorService::SensorEventConnection::hasSensor(int32_t handle) const { 1109 Mutex::Autolock _l(mConnectionLock); 1110 return mSensorInfo.indexOfKey(handle) >= 0; 1111} 1112 1113bool SensorService::SensorEventConnection::hasAnySensor() const { 1114 Mutex::Autolock _l(mConnectionLock); 1115 return mSensorInfo.size() ? true : false; 1116} 1117 1118bool SensorService::SensorEventConnection::hasOneShotSensors() const { 1119 Mutex::Autolock _l(mConnectionLock); 1120 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1121 const int handle = mSensorInfo.keyAt(i); 1122 if (mService->getSensorFromHandle(handle).getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 1123 return true; 1124 } 1125 } 1126 return false; 1127} 1128 1129void SensorService::SensorEventConnection::setFirstFlushPending(int32_t handle, 1130 bool value) { 1131 Mutex::Autolock _l(mConnectionLock); 1132 ssize_t index = mSensorInfo.indexOfKey(handle); 1133 if (index >= 0) { 1134 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1135 flushInfo.mFirstFlushPending = value; 1136 } 1137} 1138 1139void SensorService::SensorEventConnection::updateLooperRegistration(const sp<Looper>& looper) { 1140 Mutex::Autolock _l(mConnectionLock); 1141 updateLooperRegistrationLocked(looper); 1142} 1143 1144void SensorService::SensorEventConnection::updateLooperRegistrationLocked( 1145 const sp<Looper>& looper) { 1146 bool isConnectionActive = mSensorInfo.size() > 0; 1147 // If all sensors are unregistered OR Looper has encountered an error, we 1148 // can remove the Fd from the Looper if it has been previously added. 1149 if (!isConnectionActive || mDead) { 1150 if (mHasLooperCallbacks) { 1151 ALOGD_IF(DEBUG_CONNECTIONS, "%p removeFd fd=%d", this, mChannel->getSendFd()); 1152 looper->removeFd(mChannel->getSendFd()); 1153 mHasLooperCallbacks = false; 1154 } 1155 return; 1156 } 1157 1158 int looper_flags = 0; 1159 if (mCacheSize > 0) looper_flags |= ALOOPER_EVENT_OUTPUT; 1160 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1161 const int handle = mSensorInfo.keyAt(i); 1162 if (mService->getSensorFromHandle(handle).isWakeUpSensor()) { 1163 looper_flags |= ALOOPER_EVENT_INPUT; 1164 break; 1165 } 1166 } 1167 // If flags is still set to zero, we don't need to add this fd to the Looper, if 1168 // the fd has already been added, remove it. This is likely to happen when ALL the 1169 // events stored in the cache have been sent to the corresponding app. 1170 if (looper_flags == 0) { 1171 if (mHasLooperCallbacks) { 1172 ALOGD_IF(DEBUG_CONNECTIONS, "removeFd fd=%d", mChannel->getSendFd()); 1173 looper->removeFd(mChannel->getSendFd()); 1174 mHasLooperCallbacks = false; 1175 } 1176 return; 1177 } 1178 // Add the file descriptor to the Looper for receiving acknowledegments if the app has 1179 // registered for wake-up sensors OR for sending events in the cache. 1180 int ret = looper->addFd(mChannel->getSendFd(), 0, looper_flags, this, NULL); 1181 if (ret == 1) { 1182 ALOGD_IF(DEBUG_CONNECTIONS, "%p addFd fd=%d", this, mChannel->getSendFd()); 1183 mHasLooperCallbacks = true; 1184 } else { 1185 ALOGE("Looper::addFd failed ret=%d fd=%d", ret, mChannel->getSendFd()); 1186 } 1187} 1188 1189void SensorService::SensorEventConnection::incrementPendingFlushCount(int32_t handle) { 1190 Mutex::Autolock _l(mConnectionLock); 1191 ssize_t index = mSensorInfo.indexOfKey(handle); 1192 if (index >= 0) { 1193 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1194 flushInfo.mPendingFlushEventsToSend++; 1195 } 1196} 1197 1198status_t SensorService::SensorEventConnection::sendEvents( 1199 sensors_event_t const* buffer, size_t numEvents, 1200 sensors_event_t* scratch, 1201 SensorEventConnection const * const * mapFlushEventsToConnections) { 1202 // filter out events not for this connection 1203 size_t count = 0; 1204 Mutex::Autolock _l(mConnectionLock); 1205 if (scratch) { 1206 size_t i=0; 1207 while (i<numEvents) { 1208 int32_t sensor_handle = buffer[i].sensor; 1209 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 1210 ALOGD_IF(DEBUG_CONNECTIONS, "flush complete event sensor==%d ", 1211 buffer[i].meta_data.sensor); 1212 // Setting sensor_handle to the correct sensor to ensure the sensor events per 1213 // connection are filtered correctly. buffer[i].sensor is zero for meta_data 1214 // events. 1215 sensor_handle = buffer[i].meta_data.sensor; 1216 } 1217 ssize_t index = mSensorInfo.indexOfKey(sensor_handle); 1218 // Check if this connection has registered for this sensor. If not continue to the 1219 // next sensor_event. 1220 if (index < 0) { 1221 ++i; 1222 continue; 1223 } 1224 1225 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1226 // Check if there is a pending flush_complete event for this sensor on this connection. 1227 if (buffer[i].type == SENSOR_TYPE_META_DATA && flushInfo.mFirstFlushPending == true && 1228 this == mapFlushEventsToConnections[i]) { 1229 flushInfo.mFirstFlushPending = false; 1230 ALOGD_IF(DEBUG_CONNECTIONS, "First flush event for sensor==%d ", 1231 buffer[i].meta_data.sensor); 1232 ++i; 1233 continue; 1234 } 1235 1236 // If there is a pending flush complete event for this sensor on this connection, 1237 // ignore the event and proceed to the next. 1238 if (flushInfo.mFirstFlushPending) { 1239 ++i; 1240 continue; 1241 } 1242 1243 do { 1244 // Keep copying events into the scratch buffer as long as they are regular 1245 // sensor_events are from the same sensor_handle OR they are flush_complete_events 1246 // from the same sensor_handle AND the current connection is mapped to the 1247 // corresponding flush_complete_event. 1248 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 1249 if (this == mapFlushEventsToConnections[i]) { 1250 scratch[count++] = buffer[i]; 1251 } 1252 ++i; 1253 } else { 1254 // Regular sensor event, just copy it to the scratch buffer. 1255 scratch[count++] = buffer[i++]; 1256 } 1257 } while ((i<numEvents) && ((buffer[i].sensor == sensor_handle && 1258 buffer[i].type != SENSOR_TYPE_META_DATA) || 1259 (buffer[i].type == SENSOR_TYPE_META_DATA && 1260 buffer[i].meta_data.sensor == sensor_handle))); 1261 } 1262 } else { 1263 scratch = const_cast<sensors_event_t *>(buffer); 1264 count = numEvents; 1265 } 1266 1267 sendPendingFlushEventsLocked(); 1268 // Early return if there are no events for this connection. 1269 if (count == 0) { 1270 return status_t(NO_ERROR); 1271 } 1272 1273#if DEBUG_CONNECTIONS 1274 mEventsReceived += count; 1275#endif 1276 if (mCacheSize != 0) { 1277 // There are some events in the cache which need to be sent first. Copy this buffer to 1278 // the end of cache. 1279 if (mCacheSize + count <= mMaxCacheSize) { 1280 memcpy(&mEventCache[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1281 mCacheSize += count; 1282 } else { 1283 // Check if any new sensors have registered on this connection which may have increased 1284 // the max cache size that is desired. 1285 if (mCacheSize + count < computeMaxCacheSizeLocked()) { 1286 reAllocateCacheLocked(scratch, count); 1287 return status_t(NO_ERROR); 1288 } 1289 // Some events need to be dropped. 1290 int remaningCacheSize = mMaxCacheSize - mCacheSize; 1291 if (remaningCacheSize != 0) { 1292 memcpy(&mEventCache[mCacheSize], scratch, 1293 remaningCacheSize * sizeof(sensors_event_t)); 1294 } 1295 int numEventsDropped = count - remaningCacheSize; 1296 countFlushCompleteEventsLocked(mEventCache, numEventsDropped); 1297 // Drop the first "numEventsDropped" in the cache. 1298 memmove(mEventCache, &mEventCache[numEventsDropped], 1299 (mCacheSize - numEventsDropped) * sizeof(sensors_event_t)); 1300 1301 // Copy the remainingEvents in scratch buffer to the end of cache. 1302 memcpy(&mEventCache[mCacheSize - numEventsDropped], scratch + remaningCacheSize, 1303 numEventsDropped * sizeof(sensors_event_t)); 1304 } 1305 return status_t(NO_ERROR); 1306 } 1307 1308 int index_wake_up_event = findWakeUpSensorEventLocked(scratch, count); 1309 if (index_wake_up_event >= 0) { 1310 scratch[index_wake_up_event].flags |= WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1311 ++mWakeLockRefCount; 1312#if DEBUG_CONNECTIONS 1313 ++mTotalAcksNeeded; 1314#endif 1315 } 1316 1317 // NOTE: ASensorEvent and sensors_event_t are the same type. 1318 ssize_t size = SensorEventQueue::write(mChannel, 1319 reinterpret_cast<ASensorEvent const*>(scratch), count); 1320 if (size < 0) { 1321 // Write error, copy events to local cache. 1322 if (index_wake_up_event >= 0) { 1323 // If there was a wake_up sensor_event, reset the flag. 1324 scratch[index_wake_up_event].flags &= ~WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1325 if (mWakeLockRefCount > 0) { 1326 --mWakeLockRefCount; 1327 } 1328#if DEBUG_CONNECTIONS 1329 --mTotalAcksNeeded; 1330#endif 1331 } 1332 if (mEventCache == NULL) { 1333 mMaxCacheSize = computeMaxCacheSizeLocked(); 1334 mEventCache = new sensors_event_t[mMaxCacheSize]; 1335 mCacheSize = 0; 1336 } 1337 memcpy(&mEventCache[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1338 mCacheSize += count; 1339 1340 // Add this file descriptor to the looper to get a callback when this fd is available for 1341 // writing. 1342 updateLooperRegistrationLocked(mService->getLooper()); 1343 return size; 1344 } 1345 1346#if DEBUG_CONNECTIONS 1347 if (size > 0) { 1348 mEventsSent += count; 1349 } 1350#endif 1351 1352 return size < 0 ? status_t(size) : status_t(NO_ERROR); 1353} 1354 1355void SensorService::SensorEventConnection::reAllocateCacheLocked(sensors_event_t const* scratch, 1356 int count) { 1357 sensors_event_t *eventCache_new; 1358 const int new_cache_size = computeMaxCacheSizeLocked(); 1359 // Allocate new cache, copy over events from the old cache & scratch, free up memory. 1360 eventCache_new = new sensors_event_t[new_cache_size]; 1361 memcpy(eventCache_new, mEventCache, mCacheSize * sizeof(sensors_event_t)); 1362 memcpy(&eventCache_new[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1363 1364 ALOGD_IF(DEBUG_CONNECTIONS, "reAllocateCacheLocked maxCacheSize=%d %d", mMaxCacheSize, 1365 new_cache_size); 1366 1367 delete mEventCache; 1368 mEventCache = eventCache_new; 1369 mCacheSize += count; 1370 mMaxCacheSize = new_cache_size; 1371} 1372 1373void SensorService::SensorEventConnection::sendPendingFlushEventsLocked() { 1374 ASensorEvent flushCompleteEvent; 1375 memset(&flushCompleteEvent, 0, sizeof(flushCompleteEvent)); 1376 flushCompleteEvent.type = SENSOR_TYPE_META_DATA; 1377 // Loop through all the sensors for this connection and check if there are any pending 1378 // flush complete events to be sent. 1379 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1380 FlushInfo& flushInfo = mSensorInfo.editValueAt(i); 1381 while (flushInfo.mPendingFlushEventsToSend > 0) { 1382 const int sensor_handle = mSensorInfo.keyAt(i); 1383 flushCompleteEvent.meta_data.sensor = sensor_handle; 1384 bool wakeUpSensor = mService->getSensorFromHandle(sensor_handle).isWakeUpSensor(); 1385 if (wakeUpSensor) { 1386 ++mWakeLockRefCount; 1387 flushCompleteEvent.flags |= WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1388 } 1389 ssize_t size = SensorEventQueue::write(mChannel, &flushCompleteEvent, 1); 1390 if (size < 0) { 1391 if (wakeUpSensor) --mWakeLockRefCount; 1392 return; 1393 } 1394 ALOGD_IF(DEBUG_CONNECTIONS, "sent dropped flush complete event==%d ", 1395 flushCompleteEvent.meta_data.sensor); 1396 flushInfo.mPendingFlushEventsToSend--; 1397 } 1398 } 1399} 1400 1401void SensorService::SensorEventConnection::writeToSocketFromCache() { 1402 // At a time write at most half the size of the receiver buffer in SensorEventQueue OR 1403 // half the size of the socket buffer allocated in BitTube whichever is smaller. 1404 const int maxWriteSize = helpers::min(SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT/2, 1405 int(mService->mSocketBufferSize/(sizeof(sensors_event_t)*2))); 1406 Mutex::Autolock _l(mConnectionLock); 1407 // Send pending flush complete events (if any) 1408 sendPendingFlushEventsLocked(); 1409 for (int numEventsSent = 0; numEventsSent < mCacheSize;) { 1410 const int numEventsToWrite = helpers::min(mCacheSize - numEventsSent, maxWriteSize); 1411 int index_wake_up_event = 1412 findWakeUpSensorEventLocked(mEventCache + numEventsSent, numEventsToWrite); 1413 if (index_wake_up_event >= 0) { 1414 mEventCache[index_wake_up_event + numEventsSent].flags |= 1415 WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1416 ++mWakeLockRefCount; 1417#if DEBUG_CONNECTIONS 1418 ++mTotalAcksNeeded; 1419#endif 1420 } 1421 1422 ssize_t size = SensorEventQueue::write(mChannel, 1423 reinterpret_cast<ASensorEvent const*>(mEventCache + numEventsSent), 1424 numEventsToWrite); 1425 if (size < 0) { 1426 if (index_wake_up_event >= 0) { 1427 // If there was a wake_up sensor_event, reset the flag. 1428 mEventCache[index_wake_up_event + numEventsSent].flags &= 1429 ~WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1430 if (mWakeLockRefCount > 0) { 1431 --mWakeLockRefCount; 1432 } 1433#if DEBUG_CONNECTIONS 1434 --mTotalAcksNeeded; 1435#endif 1436 } 1437 memmove(mEventCache, &mEventCache[numEventsSent], 1438 (mCacheSize - numEventsSent) * sizeof(sensors_event_t)); 1439 ALOGD_IF(DEBUG_CONNECTIONS, "wrote %d events from cache size==%d ", 1440 numEventsSent, mCacheSize); 1441 mCacheSize -= numEventsSent; 1442 return; 1443 } 1444 numEventsSent += numEventsToWrite; 1445#if DEBUG_CONNECTIONS 1446 mEventsSentFromCache += numEventsToWrite; 1447#endif 1448 } 1449 ALOGD_IF(DEBUG_CONNECTIONS, "wrote all events from cache size=%d ", mCacheSize); 1450 // All events from the cache have been sent. Reset cache size to zero. 1451 mCacheSize = 0; 1452 // There are no more events in the cache. We don't need to poll for write on the fd. 1453 // Update Looper registration. 1454 updateLooperRegistrationLocked(mService->getLooper()); 1455} 1456 1457void SensorService::SensorEventConnection::countFlushCompleteEventsLocked( 1458 sensors_event_t const* scratch, const int numEventsDropped) { 1459 ALOGD_IF(DEBUG_CONNECTIONS, "dropping %d events ", numEventsDropped); 1460 // Count flushComplete events in the events that are about to the dropped. These will be sent 1461 // separately before the next batch of events. 1462 for (int j = 0; j < numEventsDropped; ++j) { 1463 if (scratch[j].type == SENSOR_TYPE_META_DATA) { 1464 FlushInfo& flushInfo = mSensorInfo.editValueFor(scratch[j].meta_data.sensor); 1465 flushInfo.mPendingFlushEventsToSend++; 1466 ALOGD_IF(DEBUG_CONNECTIONS, "increment pendingFlushCount %d", 1467 flushInfo.mPendingFlushEventsToSend); 1468 } 1469 } 1470 return; 1471} 1472 1473int SensorService::SensorEventConnection::findWakeUpSensorEventLocked( 1474 sensors_event_t const* scratch, const int count) { 1475 for (int i = 0; i < count; ++i) { 1476 if (mService->isWakeUpSensorEvent(scratch[i])) { 1477 return i; 1478 } 1479 } 1480 return -1; 1481} 1482 1483sp<BitTube> SensorService::SensorEventConnection::getSensorChannel() const 1484{ 1485 return mChannel; 1486} 1487 1488status_t SensorService::SensorEventConnection::enableDisable( 1489 int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, 1490 int reservedFlags) 1491{ 1492 status_t err; 1493 if (enabled) { 1494 err = mService->enable(this, handle, samplingPeriodNs, maxBatchReportLatencyNs, 1495 reservedFlags); 1496 1497 } else { 1498 err = mService->disable(this, handle); 1499 } 1500 return err; 1501} 1502 1503status_t SensorService::SensorEventConnection::setEventRate( 1504 int handle, nsecs_t samplingPeriodNs) 1505{ 1506 return mService->setEventRate(this, handle, samplingPeriodNs); 1507} 1508 1509status_t SensorService::SensorEventConnection::flush() { 1510 return mService->flushSensor(this); 1511} 1512 1513int SensorService::SensorEventConnection::handleEvent(int fd, int events, void* /*data*/) { 1514 if (events & ALOOPER_EVENT_HANGUP || events & ALOOPER_EVENT_ERROR) { 1515 { 1516 // If the Looper encounters some error, set the flag mDead, reset mWakeLockRefCount, 1517 // and remove the fd from Looper. Call checkWakeLockState to know if SensorService 1518 // can release the wake-lock. 1519 ALOGD_IF(DEBUG_CONNECTIONS, "%p Looper error %d", this, fd); 1520 Mutex::Autolock _l(mConnectionLock); 1521 mDead = true; 1522 mWakeLockRefCount = 0; 1523 updateLooperRegistrationLocked(mService->getLooper()); 1524 } 1525 mService->checkWakeLockState(); 1526 return 1; 1527 } 1528 1529 if (events & ALOOPER_EVENT_INPUT) { 1530 uint32_t numAcks = 0; 1531 ssize_t ret = ::recv(fd, &numAcks, sizeof(numAcks), MSG_DONTWAIT); 1532 { 1533 Mutex::Autolock _l(mConnectionLock); 1534 // Sanity check to ensure there are no read errors in recv, numAcks is always 1535 // within the range and not zero. If any of the above don't hold reset mWakeLockRefCount 1536 // to zero. 1537 if (ret != sizeof(numAcks) || numAcks > mWakeLockRefCount || numAcks == 0) { 1538 ALOGE("Looper read error ret=%d numAcks=%d", ret, numAcks); 1539 mWakeLockRefCount = 0; 1540 } else { 1541 mWakeLockRefCount -= numAcks; 1542 } 1543#if DEBUG_CONNECTIONS 1544 mTotalAcksReceived += numAcks; 1545#endif 1546 } 1547 // Check if wakelock can be released by sensorservice. mConnectionLock needs to be released 1548 // here as checkWakeLockState() will need it. 1549 if (mWakeLockRefCount == 0) { 1550 mService->checkWakeLockState(); 1551 } 1552 // continue getting callbacks. 1553 return 1; 1554 } 1555 1556 if (events & ALOOPER_EVENT_OUTPUT) { 1557 // send sensor data that is stored in mEventCache for this connection. 1558 mService->sendEventsFromCache(this); 1559 } 1560 return 1; 1561} 1562 1563int SensorService::SensorEventConnection::computeMaxCacheSizeLocked() const { 1564 int fifoWakeUpSensors = 0; 1565 int fifoNonWakeUpSensors = 0; 1566 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1567 const Sensor& sensor = mService->getSensorFromHandle(mSensorInfo.keyAt(i)); 1568 if (sensor.getFifoReservedEventCount() == sensor.getFifoMaxEventCount()) { 1569 // Each sensor has a reserved fifo. Sum up the fifo sizes for all wake up sensors and 1570 // non wake_up sensors. 1571 if (sensor.isWakeUpSensor()) { 1572 fifoWakeUpSensors += sensor.getFifoReservedEventCount(); 1573 } else { 1574 fifoNonWakeUpSensors += sensor.getFifoReservedEventCount(); 1575 } 1576 } else { 1577 // Shared fifo. Compute the max of the fifo sizes for wake_up and non_wake up sensors. 1578 if (sensor.isWakeUpSensor()) { 1579 fifoWakeUpSensors = fifoWakeUpSensors > sensor.getFifoMaxEventCount() ? 1580 fifoWakeUpSensors : sensor.getFifoMaxEventCount(); 1581 1582 } else { 1583 fifoNonWakeUpSensors = fifoNonWakeUpSensors > sensor.getFifoMaxEventCount() ? 1584 fifoNonWakeUpSensors : sensor.getFifoMaxEventCount(); 1585 1586 } 1587 } 1588 } 1589 if (fifoWakeUpSensors + fifoNonWakeUpSensors == 0) { 1590 // It is extremely unlikely that there is a write failure in non batch mode. Return a cache 1591 // size that is equal to that of the batch mode. 1592 // ALOGW("Write failure in non-batch mode"); 1593 return MAX_SOCKET_BUFFER_SIZE_BATCHED/sizeof(sensors_event_t); 1594 } 1595 return fifoWakeUpSensors + fifoNonWakeUpSensors; 1596} 1597 1598// --------------------------------------------------------------------------- 1599}; // namespace android 1600 1601