SensorService.cpp revision 6c2664ae34fd582bc174d3c83e2b18e895ca2496
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 mSocketBufferSize = SOCKET_BUFFER_SIZE_NON_BATCHED; 154 FILE *fp = fopen("/proc/sys/net/core/wmem_max", "r"); 155 char line[128]; 156 if (fp != NULL && fgets(line, sizeof(line), fp) != NULL) { 157 line[sizeof(line) - 1] = '\0'; 158 sscanf(line, "%zu", &mSocketBufferSize); 159 if (mSocketBufferSize > MAX_SOCKET_BUFFER_SIZE_BATCHED) { 160 mSocketBufferSize = MAX_SOCKET_BUFFER_SIZE_BATCHED; 161 } 162 } 163 if (fp) { 164 fclose(fp); 165 } 166 167 mWakeLockAcquired = false; 168 run("SensorService", PRIORITY_URGENT_DISPLAY); 169 mLooper = new Looper(false); 170 mInitCheck = NO_ERROR; 171 } 172 } 173} 174 175Sensor SensorService::registerSensor(SensorInterface* s) 176{ 177 sensors_event_t event; 178 memset(&event, 0, sizeof(event)); 179 180 const Sensor sensor(s->getSensor()); 181 // add to the sensor list (returned to clients) 182 mSensorList.add(sensor); 183 // add to our handle->SensorInterface mapping 184 mSensorMap.add(sensor.getHandle(), s); 185 // create an entry in the mLastEventSeen array 186 mLastEventSeen.add(sensor.getHandle(), event); 187 188 return sensor; 189} 190 191Sensor SensorService::registerVirtualSensor(SensorInterface* s) 192{ 193 Sensor sensor = registerSensor(s); 194 mVirtualSensorList.add( s ); 195 return sensor; 196} 197 198SensorService::~SensorService() 199{ 200 for (size_t i=0 ; i<mSensorMap.size() ; i++) 201 delete mSensorMap.valueAt(i); 202} 203 204static const String16 sDump("android.permission.DUMP"); 205 206status_t SensorService::dump(int fd, const Vector<String16>& /*args*/) 207{ 208 String8 result; 209 if (!PermissionCache::checkCallingPermission(sDump)) { 210 result.appendFormat("Permission Denial: " 211 "can't dump SensorService from pid=%d, uid=%d\n", 212 IPCThreadState::self()->getCallingPid(), 213 IPCThreadState::self()->getCallingUid()); 214 } else { 215 Mutex::Autolock _l(mLock); 216 result.append("Sensor List:\n"); 217 for (size_t i=0 ; i<mSensorList.size() ; i++) { 218 const Sensor& s(mSensorList[i]); 219 const sensors_event_t& e(mLastEventSeen.valueFor(s.getHandle())); 220 result.appendFormat( 221 "%-15s| %-10s| %-20s| 0x%08x | \"%s\" | type=%d |", 222 s.getName().string(), 223 s.getVendor().string(), 224 s.getStringType().string(), 225 s.getHandle(), 226 s.getRequiredPermission().string(), 227 s.getType()); 228 229 const int reportingMode = s.getReportingMode(); 230 if (reportingMode == AREPORTING_MODE_CONTINUOUS) { 231 result.append(" continuous | "); 232 } else if (reportingMode == AREPORTING_MODE_ON_CHANGE) { 233 result.append(" on-change | "); 234 } else if (reportingMode == AREPORTING_MODE_ONE_SHOT) { 235 result.append(" one-shot | "); 236 } else { 237 result.append(" special-trigger | "); 238 } 239 240 if (s.getMaxDelay() > 0) { 241 result.appendFormat("minRate=%.2fHz | ", 1e6f / s.getMaxDelay()); 242 } else { 243 result.appendFormat("maxDelay=%dus |", s.getMaxDelay()); 244 } 245 246 if (s.getMinDelay() > 0) { 247 result.appendFormat("maxRate=%.2fHz | ", 1e6f / s.getMinDelay()); 248 } else { 249 result.appendFormat("minDelay=%dus |", s.getMinDelay()); 250 } 251 252 if (s.getFifoMaxEventCount() > 0) { 253 result.appendFormat("FifoMax=%d events | ", 254 s.getFifoMaxEventCount()); 255 } else { 256 result.append("no batching | "); 257 } 258 259 if (s.isWakeUpSensor()) { 260 result.appendFormat("wakeUp | "); 261 } else { 262 result.appendFormat("non-wakeUp | "); 263 } 264 265 switch (s.getType()) { 266 case SENSOR_TYPE_ROTATION_VECTOR: 267 case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR: 268 result.appendFormat( 269 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 270 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.timestamp); 271 break; 272 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED: 273 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 274 result.appendFormat( 275 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 276 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.data[5], 277 e.timestamp); 278 break; 279 case SENSOR_TYPE_GAME_ROTATION_VECTOR: 280 result.appendFormat( 281 "last=<%5.1f,%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 282 e.data[0], e.data[1], e.data[2], e.data[3], e.timestamp); 283 break; 284 case SENSOR_TYPE_SIGNIFICANT_MOTION: 285 case SENSOR_TYPE_STEP_DETECTOR: 286 result.appendFormat( "last=<%f %" PRId64 ">\n", e.data[0], e.timestamp); 287 break; 288 case SENSOR_TYPE_STEP_COUNTER: 289 result.appendFormat( "last=<%" PRIu64 ", %" PRId64 ">\n", e.u64.step_counter, 290 e.timestamp); 291 break; 292 default: 293 // default to 3 values 294 result.appendFormat( 295 "last=<%5.1f,%5.1f,%5.1f, %" PRId64 ">\n", 296 e.data[0], e.data[1], e.data[2], e.timestamp); 297 break; 298 } 299 result.append("\n"); 300 } 301 SensorFusion::getInstance().dump(result); 302 SensorDevice::getInstance().dump(result); 303 304 result.append("Active sensors:\n"); 305 for (size_t i=0 ; i<mActiveSensors.size() ; i++) { 306 int handle = mActiveSensors.keyAt(i); 307 result.appendFormat("%s (handle=0x%08x, connections=%zu)\n", 308 getSensorName(handle).string(), 309 handle, 310 mActiveSensors.valueAt(i)->getNumConnections()); 311 } 312 313 result.appendFormat("Max Socket Buffer size = %d events\n", 314 mSocketBufferSize/sizeof(sensors_event_t)); 315 result.appendFormat("WakeLock Status: %s \n", mWakeLockAcquired ? "acquired" : "not held"); 316 result.appendFormat("%zd active connections\n", mActiveConnections.size()); 317 318 for (size_t i=0 ; i < mActiveConnections.size() ; i++) { 319 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 320 if (connection != 0) { 321 result.appendFormat("Connection Number: %zu \n", i); 322 connection->dump(result); 323 } 324 } 325 } 326 write(fd, result.string(), result.size()); 327 return NO_ERROR; 328} 329 330void SensorService::cleanupAutoDisabledSensorLocked(const sp<SensorEventConnection>& connection, 331 sensors_event_t const* buffer, const int count) { 332 for (int i=0 ; i<count ; i++) { 333 int handle = buffer[i].sensor; 334 if (connection->hasSensor(handle)) { 335 SensorInterface* sensor = mSensorMap.valueFor(handle); 336 // If this buffer has an event from a one_shot sensor and this connection is registered 337 // for this particular one_shot sensor, try cleaning up the connection. 338 if (sensor != NULL && 339 sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 340 sensor->autoDisable(connection.get(), handle); 341 cleanupWithoutDisableLocked(connection, handle); 342 } 343 } 344 } 345} 346 347bool SensorService::threadLoop() 348{ 349 ALOGD("nuSensorService thread starting..."); 350 351 // each virtual sensor could generate an event per "real" event, that's why we need 352 // to size numEventMax much smaller than MAX_RECEIVE_BUFFER_EVENT_COUNT. 353 // in practice, this is too aggressive, but guaranteed to be enough. 354 const size_t minBufferSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT; 355 const size_t numEventMax = minBufferSize / (1 + mVirtualSensorList.size()); 356 357 sensors_event_t buffer[minBufferSize]; 358 sensors_event_t scratch[minBufferSize]; 359 SensorDevice& device(SensorDevice::getInstance()); 360 const size_t vcount = mVirtualSensorList.size(); 361 362 SensorEventAckReceiver sender(this); 363 sender.run("SensorEventAckReceiver", PRIORITY_URGENT_DISPLAY); 364 ssize_t count; 365 const int halVersion = device.getHalDeviceVersion(); 366 do { 367 count = device.poll(buffer, numEventMax); 368 if (count<0) { 369 ALOGE("sensor poll failed (%s)", strerror(-count)); 370 break; 371 } 372 373 // Reset sensors_event_t.flags to zero for all events in the buffer. 374 for (int i = 0; i < count; i++) { 375 buffer[i].flags = 0; 376 } 377 Mutex::Autolock _l(mLock); 378 // Poll has returned. Hold a wakelock if one of the events is from a wake up sensor. The 379 // rest of this loop is under a critical section protected by mLock. Acquiring a wakeLock, 380 // sending events to clients (incrementing SensorEventConnection::mWakeLockRefCount) should 381 // not be interleaved with decrementing SensorEventConnection::mWakeLockRefCount and 382 // releasing the wakelock. 383 bool bufferHasWakeUpEvent = false; 384 for (int i = 0; i < count; i++) { 385 if (isWakeUpSensorEvent(buffer[i])) { 386 bufferHasWakeUpEvent = true; 387 break; 388 } 389 } 390 391 if (bufferHasWakeUpEvent && !mWakeLockAcquired) { 392 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 393 mWakeLockAcquired = true; 394 ALOGD_IF(DEBUG_CONNECTIONS, "acquired wakelock %s", WAKE_LOCK_NAME); 395 } 396 recordLastValueLocked(buffer, count); 397 398 // handle virtual sensors 399 if (count && vcount) { 400 sensors_event_t const * const event = buffer; 401 const size_t activeVirtualSensorCount = mActiveVirtualSensors.size(); 402 if (activeVirtualSensorCount) { 403 size_t k = 0; 404 SensorFusion& fusion(SensorFusion::getInstance()); 405 if (fusion.isEnabled()) { 406 for (size_t i=0 ; i<size_t(count) ; i++) { 407 fusion.process(event[i]); 408 } 409 } 410 for (size_t i=0 ; i<size_t(count) && k<minBufferSize ; i++) { 411 for (size_t j=0 ; j<activeVirtualSensorCount ; j++) { 412 if (count + k >= minBufferSize) { 413 ALOGE("buffer too small to hold all events: " 414 "count=%zd, k=%zu, size=%zu", 415 count, k, minBufferSize); 416 break; 417 } 418 sensors_event_t out; 419 SensorInterface* si = mActiveVirtualSensors.valueAt(j); 420 if (si->process(&out, event[i])) { 421 buffer[count + k] = out; 422 k++; 423 } 424 } 425 } 426 if (k) { 427 // record the last synthesized values 428 recordLastValueLocked(&buffer[count], k); 429 count += k; 430 // sort the buffer by time-stamps 431 sortEventBuffer(buffer, count); 432 } 433 } 434 } 435 436 // handle backward compatibility for RotationVector sensor 437 if (halVersion < SENSORS_DEVICE_API_VERSION_1_0) { 438 for (int i = 0; i < count; i++) { 439 if (buffer[i].type == SENSOR_TYPE_ROTATION_VECTOR) { 440 // All the 4 components of the quaternion should be available 441 // No heading accuracy. Set it to -1 442 buffer[i].data[4] = -1; 443 } 444 } 445 } 446 447 // Send our events to clients. Check the state of wake lock for each client and release the 448 // lock if none of the clients need it. 449 bool needsWakeLock = false; 450 for (size_t i=0 ; i < mActiveConnections.size(); i++) { 451 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 452 if (connection != 0) { 453 connection->sendEvents(buffer, count, scratch); 454 needsWakeLock |= connection->needsWakeLock(); 455 // Some sensors need to be auto disabled after the trigger 456 cleanupAutoDisabledSensorLocked(connection, buffer, count); 457 } 458 } 459 460 if (mWakeLockAcquired && !needsWakeLock) { 461 release_wake_lock(WAKE_LOCK_NAME); 462 mWakeLockAcquired = false; 463 ALOGD_IF(DEBUG_CONNECTIONS, "released wakelock %s", WAKE_LOCK_NAME); 464 } 465 } while (count >= 0 || Thread::exitPending()); 466 467 ALOGW("Exiting SensorService::threadLoop => aborting..."); 468 abort(); 469 return false; 470} 471 472sp<Looper> SensorService::getLooper() const { 473 return mLooper; 474} 475 476bool SensorService::SensorEventAckReceiver::threadLoop() { 477 ALOGD("new thread SensorEventAckReceiver"); 478 do { 479 sp<Looper> looper = mService->getLooper(); 480 looper->pollOnce(-1); 481 } while(!Thread::exitPending()); 482 return false; 483} 484 485void SensorService::recordLastValueLocked( 486 const sensors_event_t* buffer, size_t count) { 487 const sensors_event_t* last = NULL; 488 for (size_t i = 0; i < count; i++) { 489 const sensors_event_t* event = &buffer[i]; 490 if (event->type != SENSOR_TYPE_META_DATA) { 491 if (last && event->sensor != last->sensor) { 492 mLastEventSeen.editValueFor(last->sensor) = *last; 493 } 494 last = event; 495 } 496 } 497 if (last) { 498 mLastEventSeen.editValueFor(last->sensor) = *last; 499 } 500} 501 502void SensorService::sortEventBuffer(sensors_event_t* buffer, size_t count) 503{ 504 struct compar { 505 static int cmp(void const* lhs, void const* rhs) { 506 sensors_event_t const* l = static_cast<sensors_event_t const*>(lhs); 507 sensors_event_t const* r = static_cast<sensors_event_t const*>(rhs); 508 return l->timestamp - r->timestamp; 509 } 510 }; 511 qsort(buffer, count, sizeof(sensors_event_t), compar::cmp); 512} 513 514String8 SensorService::getSensorName(int handle) const { 515 size_t count = mUserSensorList.size(); 516 for (size_t i=0 ; i<count ; i++) { 517 const Sensor& sensor(mUserSensorList[i]); 518 if (sensor.getHandle() == handle) { 519 return sensor.getName(); 520 } 521 } 522 String8 result("unknown"); 523 return result; 524} 525 526bool SensorService::isVirtualSensor(int handle) const { 527 SensorInterface* sensor = mSensorMap.valueFor(handle); 528 return sensor->isVirtual(); 529} 530 531bool SensorService::isWakeUpSensorEvent(const sensors_event_t& event) const { 532 int handle = event.sensor; 533 if (event.type == SENSOR_TYPE_META_DATA) { 534 handle = event.meta_data.sensor; 535 } 536 SensorInterface* sensor = mSensorMap.valueFor(handle); 537 return sensor != NULL && sensor->getSensor().isWakeUpSensor(); 538} 539 540 541SensorService::SensorRecord * SensorService::getSensorRecord(int handle) { 542 return mActiveSensors.valueFor(handle); 543} 544 545Vector<Sensor> SensorService::getSensorList() 546{ 547 char value[PROPERTY_VALUE_MAX]; 548 property_get("debug.sensors", value, "0"); 549 const Vector<Sensor>& initialSensorList = (atoi(value)) ? 550 mUserSensorListDebug : mUserSensorList; 551 Vector<Sensor> accessibleSensorList; 552 for (size_t i = 0; i < initialSensorList.size(); i++) { 553 Sensor sensor = initialSensorList[i]; 554 if (canAccessSensor(sensor)) { 555 accessibleSensorList.add(sensor); 556 } else { 557 String8 infoMessage; 558 infoMessage.appendFormat( 559 "Skipped sensor %s because it requires permission %s", 560 sensor.getName().string(), 561 sensor.getRequiredPermission().string()); 562 ALOGI(infoMessage.string()); 563 } 564 } 565 return accessibleSensorList; 566} 567 568sp<ISensorEventConnection> SensorService::createSensorEventConnection() 569{ 570 uid_t uid = IPCThreadState::self()->getCallingUid(); 571 sp<SensorEventConnection> result(new SensorEventConnection(this, uid)); 572 return result; 573} 574 575void SensorService::cleanupConnection(SensorEventConnection* c) 576{ 577 Mutex::Autolock _l(mLock); 578 const wp<SensorEventConnection> connection(c); 579 size_t size = mActiveSensors.size(); 580 ALOGD_IF(DEBUG_CONNECTIONS, "%zu active sensors", size); 581 for (size_t i=0 ; i<size ; ) { 582 int handle = mActiveSensors.keyAt(i); 583 if (c->hasSensor(handle)) { 584 ALOGD_IF(DEBUG_CONNECTIONS, "%zu: disabling handle=0x%08x", i, handle); 585 SensorInterface* sensor = mSensorMap.valueFor( handle ); 586 ALOGE_IF(!sensor, "mSensorMap[handle=0x%08x] is null!", handle); 587 if (sensor) { 588 sensor->activate(c, false); 589 } 590 } 591 SensorRecord* rec = mActiveSensors.valueAt(i); 592 ALOGE_IF(!rec, "mActiveSensors[%zu] is null (handle=0x%08x)!", i, handle); 593 ALOGD_IF(DEBUG_CONNECTIONS, 594 "removing connection %p for sensor[%zu].handle=0x%08x", 595 c, i, handle); 596 597 if (rec && rec->removeConnection(connection)) { 598 ALOGD_IF(DEBUG_CONNECTIONS, "... and it was the last connection"); 599 mActiveSensors.removeItemsAt(i, 1); 600 mActiveVirtualSensors.removeItem(handle); 601 delete rec; 602 size--; 603 } else { 604 i++; 605 } 606 } 607 mActiveConnections.remove(connection); 608 BatteryService::cleanup(c->getUid()); 609 if (c->needsWakeLock()) { 610 checkWakeLockStateLocked(); 611 } 612} 613 614Sensor SensorService::getSensorFromHandle(int handle) const { 615 return mSensorMap.valueFor(handle)->getSensor(); 616} 617 618status_t SensorService::enable(const sp<SensorEventConnection>& connection, 619 int handle, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, int reservedFlags) 620{ 621 if (mInitCheck != NO_ERROR) 622 return mInitCheck; 623 624 SensorInterface* sensor = mSensorMap.valueFor(handle); 625 if (sensor == NULL) { 626 return BAD_VALUE; 627 } 628 629 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried enabling")) { 630 return BAD_VALUE; 631 } 632 633 Mutex::Autolock _l(mLock); 634 SensorRecord* rec = mActiveSensors.valueFor(handle); 635 if (rec == 0) { 636 rec = new SensorRecord(connection); 637 mActiveSensors.add(handle, rec); 638 if (sensor->isVirtual()) { 639 mActiveVirtualSensors.add(handle, sensor); 640 } 641 } else { 642 if (rec->addConnection(connection)) { 643 // this sensor is already activated, but we are adding a connection that uses it. 644 // Immediately send down the last known value of the requested sensor if it's not a 645 // "continuous" sensor. 646 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ON_CHANGE) { 647 // NOTE: The wake_up flag of this event may get set to 648 // WAKE_UP_SENSOR_EVENT_NEEDS_ACK if this is a wake_up event. 649 sensors_event_t& event(mLastEventSeen.editValueFor(handle)); 650 if (event.version == sizeof(sensors_event_t)) { 651 if (isWakeUpSensorEvent(event) && !mWakeLockAcquired) { 652 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 653 mWakeLockAcquired = true; 654 ALOGD_IF(DEBUG_CONNECTIONS, "acquired wakelock for on_change sensor %s", 655 WAKE_LOCK_NAME); 656 } 657 connection->sendEvents(&event, 1, NULL); 658 if (!connection->needsWakeLock() && mWakeLockAcquired) { 659 checkWakeLockStateLocked(); 660 } 661 } 662 } 663 } 664 } 665 666 if (connection->addSensor(handle)) { 667 BatteryService::enableSensor(connection->getUid(), handle); 668 // the sensor was added (which means it wasn't already there) 669 // so, see if this connection becomes active 670 if (mActiveConnections.indexOf(connection) < 0) { 671 mActiveConnections.add(connection); 672 } 673 } else { 674 ALOGW("sensor %08x already enabled in connection %p (ignoring)", 675 handle, connection.get()); 676 } 677 678 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 679 if (samplingPeriodNs < minDelayNs) { 680 samplingPeriodNs = minDelayNs; 681 } 682 683 ALOGD_IF(DEBUG_CONNECTIONS, "Calling batch handle==%d flags=%d" 684 "rate=%" PRId64 " timeout== %" PRId64"", 685 handle, reservedFlags, samplingPeriodNs, maxBatchReportLatencyNs); 686 687 status_t err = sensor->batch(connection.get(), handle, reservedFlags, samplingPeriodNs, 688 maxBatchReportLatencyNs); 689 690 if (err == NO_ERROR && sensor->getSensor().getReportingMode() != AREPORTING_MODE_ONE_SHOT) { 691 status_t err_flush = sensor->flush(connection.get(), handle); 692 // Flush may return error if the sensor is not activated or the underlying h/w sensor does 693 // not support flush. 694 if (err_flush == NO_ERROR) { 695 connection->setFirstFlushPending(handle, true); 696 rec->addPendingFlushConnection(connection.get()); 697 } 698 } 699 700 if (err == NO_ERROR) { 701 ALOGD_IF(DEBUG_CONNECTIONS, "Calling activate on %d", handle); 702 err = sensor->activate(connection.get(), true); 703 } 704 705 if (err == NO_ERROR && sensor->getSensor().isWakeUpSensor()) { 706 // Add the file descriptor to the Looper for receiving acknowledgments; 707 int ret = mLooper->addFd(connection->getSensorChannel()->getSendFd(), 0, 708 ALOOPER_EVENT_INPUT, connection.get(), NULL); 709 } 710 711 if (err != NO_ERROR) { 712 // batch/activate has failed, reset our state. 713 cleanupWithoutDisableLocked(connection, handle); 714 } 715 return err; 716} 717 718status_t SensorService::disable(const sp<SensorEventConnection>& connection, 719 int handle) 720{ 721 if (mInitCheck != NO_ERROR) 722 return mInitCheck; 723 724 Mutex::Autolock _l(mLock); 725 status_t err = cleanupWithoutDisableLocked(connection, handle); 726 if (err == NO_ERROR) { 727 SensorInterface* sensor = mSensorMap.valueFor(handle); 728 err = sensor ? sensor->activate(connection.get(), false) : status_t(BAD_VALUE); 729 } 730 return err; 731} 732 733status_t SensorService::cleanupWithoutDisable( 734 const sp<SensorEventConnection>& connection, int handle) { 735 Mutex::Autolock _l(mLock); 736 return cleanupWithoutDisableLocked(connection, handle); 737} 738 739status_t SensorService::cleanupWithoutDisableLocked( 740 const sp<SensorEventConnection>& connection, int handle) { 741 SensorRecord* rec = mActiveSensors.valueFor(handle); 742 if (rec) { 743 // see if this connection becomes inactive 744 if (connection->removeSensor(handle)) { 745 BatteryService::disableSensor(connection->getUid(), handle); 746 } 747 if (connection->hasAnySensor() == false) { 748 mActiveConnections.remove(connection); 749 } 750 // see if this sensor becomes inactive 751 if (rec->removeConnection(connection)) { 752 mActiveSensors.removeItem(handle); 753 mActiveVirtualSensors.removeItem(handle); 754 delete rec; 755 } 756 return NO_ERROR; 757 } 758 return BAD_VALUE; 759} 760 761status_t SensorService::setEventRate(const sp<SensorEventConnection>& connection, 762 int handle, nsecs_t ns) 763{ 764 if (mInitCheck != NO_ERROR) 765 return mInitCheck; 766 767 SensorInterface* sensor = mSensorMap.valueFor(handle); 768 if (!sensor) 769 return BAD_VALUE; 770 771 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried configuring")) { 772 return BAD_VALUE; 773 } 774 775 if (ns < 0) 776 return BAD_VALUE; 777 778 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 779 if (ns < minDelayNs) { 780 ns = minDelayNs; 781 } 782 783 return sensor->setDelay(connection.get(), handle, ns); 784} 785 786status_t SensorService::flushSensor(const sp<SensorEventConnection>& connection, 787 int handle) { 788 if (mInitCheck != NO_ERROR) return mInitCheck; 789 SensorInterface* sensor = mSensorMap.valueFor(handle); 790 if (sensor == NULL) { 791 return BAD_VALUE; 792 } 793 794 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried flushing")) { 795 return BAD_VALUE; 796 } 797 798 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 799 ALOGE("flush called on a one-shot sensor"); 800 return INVALID_OPERATION; 801 } 802 803 status_t ret = sensor->flush(connection.get(), handle); 804 if (ret == NO_ERROR) { 805 SensorRecord* rec = mActiveSensors.valueFor(handle); 806 if (rec != NULL) rec->addPendingFlushConnection(connection); 807 } 808 return ret; 809} 810 811 812bool SensorService::canAccessSensor(const Sensor& sensor) { 813 return (sensor.getRequiredPermission().isEmpty()) || 814 PermissionCache::checkCallingPermission(String16(sensor.getRequiredPermission())); 815} 816 817bool SensorService::verifyCanAccessSensor(const Sensor& sensor, const char* operation) { 818 if (canAccessSensor(sensor)) { 819 return true; 820 } else { 821 String8 errorMessage; 822 errorMessage.appendFormat( 823 "%s a sensor (%s) without holding its required permission: %s", 824 operation, 825 sensor.getName().string(), 826 sensor.getRequiredPermission().string()); 827 return false; 828 } 829} 830 831void SensorService::checkWakeLockState() { 832 Mutex::Autolock _l(mLock); 833 checkWakeLockStateLocked(); 834} 835 836void SensorService::checkWakeLockStateLocked() { 837 if (!mWakeLockAcquired) { 838 return; 839 } 840 bool releaseLock = true; 841 for (size_t i=0 ; i<mActiveConnections.size() ; i++) { 842 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 843 if (connection != 0) { 844 if (connection->needsWakeLock()) { 845 releaseLock = false; 846 break; 847 } 848 } 849 } 850 if (releaseLock) { 851 ALOGD_IF(DEBUG_CONNECTIONS, "releasing wakelock %s", WAKE_LOCK_NAME); 852 release_wake_lock(WAKE_LOCK_NAME); 853 mWakeLockAcquired = false; 854 } 855} 856 857// --------------------------------------------------------------------------- 858SensorService::SensorRecord::SensorRecord( 859 const sp<SensorEventConnection>& connection) 860{ 861 mConnections.add(connection); 862} 863 864bool SensorService::SensorRecord::addConnection( 865 const sp<SensorEventConnection>& connection) 866{ 867 if (mConnections.indexOf(connection) < 0) { 868 mConnections.add(connection); 869 return true; 870 } 871 return false; 872} 873 874bool SensorService::SensorRecord::removeConnection( 875 const wp<SensorEventConnection>& connection) 876{ 877 ssize_t index = mConnections.indexOf(connection); 878 if (index >= 0) { 879 mConnections.removeItemsAt(index, 1); 880 } 881 // Remove this connections from the queue of flush() calls made on this sensor. 882 for (Vector< wp<SensorEventConnection> >::iterator it = 883 mPendingFlushConnections.begin(); it != mPendingFlushConnections.end();) { 884 if (it->unsafe_get() == connection.unsafe_get()) { 885 it = mPendingFlushConnections.erase(it); 886 } else { 887 ++it; 888 } 889 } 890 return mConnections.size() ? false : true; 891} 892 893void SensorService::SensorRecord::addPendingFlushConnection( 894 const sp<SensorEventConnection>& connection) { 895 mPendingFlushConnections.add(connection); 896} 897 898void SensorService::SensorRecord::removeFirstPendingFlushConnection() { 899 if (mPendingFlushConnections.size() > 0) { 900 mPendingFlushConnections.removeAt(0); 901 } 902} 903 904SensorService::SensorEventConnection * 905SensorService::SensorRecord::getFirstPendingFlushConnection() { 906 if (mPendingFlushConnections.size() > 0) { 907 return mPendingFlushConnections[0].unsafe_get(); 908 } 909 return NULL; 910} 911 912// --------------------------------------------------------------------------- 913 914SensorService::SensorEventConnection::SensorEventConnection( 915 const sp<SensorService>& service, uid_t uid) 916 : mService(service), mUid(uid), mWakeLockRefCount(0), mEventCache(NULL), mCacheSize(0), 917 mMaxCacheSize(0) { 918 const SensorDevice& device(SensorDevice::getInstance()); 919 if (device.getHalDeviceVersion() >= SENSORS_DEVICE_API_VERSION_1_1) { 920 // Increase socket buffer size to a max of 100 KB for batching capabilities. 921 mChannel = new BitTube(mService->mSocketBufferSize); 922 } else { 923 mChannel = new BitTube(SOCKET_BUFFER_SIZE_NON_BATCHED); 924 } 925#if DEBUG_CONNECTIONS 926 mEventsReceived = mEventsSentFromCache = mEventsSent = 0; 927#endif 928} 929 930SensorService::SensorEventConnection::~SensorEventConnection() { 931 ALOGD_IF(DEBUG_CONNECTIONS, "~SensorEventConnection(%p)", this); 932 if (mEventCache != NULL) { 933 delete mEventCache; 934 } 935 mService->cleanupConnection(this); 936} 937 938void SensorService::SensorEventConnection::onFirstRef() { 939 LooperCallback::onFirstRef(); 940} 941 942bool SensorService::SensorEventConnection::needsWakeLock() { 943 Mutex::Autolock _l(mConnectionLock); 944 return mWakeLockRefCount > 0; 945} 946 947void SensorService::SensorEventConnection::dump(String8& result) { 948 Mutex::Autolock _l(mConnectionLock); 949 result.appendFormat("\t %d WakeLockRefCount \n", mWakeLockRefCount); 950 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 951 const FlushInfo& flushInfo = mSensorInfo.valueAt(i); 952 result.appendFormat("\t %s 0x%08x | status: %s | pending flush events %d | uid %d|" 953 "cache size: %d max cache size %d\n", 954 mService->getSensorName(mSensorInfo.keyAt(i)).string(), 955 mSensorInfo.keyAt(i), 956 flushInfo.mFirstFlushPending ? "First flush pending" : 957 "active", 958 flushInfo.mPendingFlushEventsToSend, 959 mUid, 960 mCacheSize, 961 mMaxCacheSize); 962#if DEBUG_CONNECTIONS 963 result.appendFormat("\t events recvd: %d | sent %d | cache %d | dropped %d\n", 964 mEventsReceived, 965 mEventsSent, 966 mEventsSentFromCache, 967 mEventsReceived - (mEventsSentFromCache 968 mEventsSent + mCacheSize)); 969#endif 970 971 } 972} 973 974bool SensorService::SensorEventConnection::addSensor(int32_t handle) { 975 Mutex::Autolock _l(mConnectionLock); 976 if (!verifyCanAccessSensor(mService->getSensorFromHandle(handle), "Tried adding")) { 977 return false; 978 } 979 if (mSensorInfo.indexOfKey(handle) < 0) { 980 mSensorInfo.add(handle, FlushInfo()); 981 return true; 982 } 983 return false; 984} 985 986bool SensorService::SensorEventConnection::removeSensor(int32_t handle) { 987 Mutex::Autolock _l(mConnectionLock); 988 if (mSensorInfo.removeItem(handle) >= 0) { 989 return true; 990 } 991 return false; 992} 993 994bool SensorService::SensorEventConnection::hasSensor(int32_t handle) const { 995 Mutex::Autolock _l(mConnectionLock); 996 return mSensorInfo.indexOfKey(handle) >= 0; 997} 998 999bool SensorService::SensorEventConnection::hasAnySensor() const { 1000 Mutex::Autolock _l(mConnectionLock); 1001 return mSensorInfo.size() ? true : false; 1002} 1003 1004void SensorService::SensorEventConnection::setFirstFlushPending(int32_t handle, 1005 bool value) { 1006 Mutex::Autolock _l(mConnectionLock); 1007 ssize_t index = mSensorInfo.indexOfKey(handle); 1008 if (index >= 0) { 1009 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1010 flushInfo.mFirstFlushPending = value; 1011 } 1012} 1013 1014status_t SensorService::SensorEventConnection::sendEvents( 1015 sensors_event_t const* buffer, size_t numEvents, 1016 sensors_event_t* scratch) { 1017 // filter out events not for this connection 1018 size_t count = 0; 1019 Mutex::Autolock _l(mConnectionLock); 1020 if (scratch) { 1021 size_t i=0; 1022 while (i<numEvents) { 1023 int32_t sensor_handle = buffer[i].sensor; 1024 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 1025 ALOGD_IF(DEBUG_CONNECTIONS, "flush complete event sensor==%d ", 1026 buffer[i].meta_data.sensor); 1027 // Setting sensor_handle to the correct sensor to ensure the sensor events per connection are 1028 // filtered correctly. buffer[i].sensor is zero for meta_data events. 1029 sensor_handle = buffer[i].meta_data.sensor; 1030 } 1031 ssize_t index = mSensorInfo.indexOfKey(sensor_handle); 1032 // Check if this connection has registered for this sensor. If not continue to the 1033 // next sensor_event. 1034 if (index < 0) { 1035 ++i; 1036 continue; 1037 } 1038 1039 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 1040 // Check if there is a pending flush_complete event for this sensor on this connection. 1041 if (buffer[i].type == SENSOR_TYPE_META_DATA && flushInfo.mFirstFlushPending == true) { 1042 SensorService::SensorRecord *rec = mService->getSensorRecord(sensor_handle); 1043 if (rec && rec->getFirstPendingFlushConnection() == this) { 1044 rec->removeFirstPendingFlushConnection(); 1045 flushInfo.mFirstFlushPending = false; 1046 ++i; 1047 ALOGD_IF(DEBUG_CONNECTIONS, "First flush event for sensor==%d ", 1048 buffer[i].meta_data.sensor); 1049 continue; 1050 } 1051 } 1052 1053 // If there is a pending flush complete event for this sensor on this connection, 1054 // ignore the event and proceed to the next. 1055 if (flushInfo.mFirstFlushPending) { 1056 ++i; 1057 continue; 1058 } 1059 1060 do { 1061 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 1062 // Check if this connection has called flush() on this sensor. Only if 1063 // a flush() has been explicitly called, send a flush_complete_event. 1064 SensorService::SensorRecord *rec = mService->getSensorRecord(sensor_handle); 1065 if (rec && rec->getFirstPendingFlushConnection() == this) { 1066 rec->removeFirstPendingFlushConnection(); 1067 scratch[count++] = buffer[i]; 1068 } 1069 ++i; 1070 } else { 1071 // Regular sensor event, just copy it to the scratch buffer. 1072 scratch[count++] = buffer[i++]; 1073 } 1074 } while ((i<numEvents) && ((buffer[i].sensor == sensor_handle) || 1075 (buffer[i].type == SENSOR_TYPE_META_DATA && 1076 buffer[i].meta_data.sensor == sensor_handle))); 1077 } 1078 } else { 1079 scratch = const_cast<sensors_event_t *>(buffer); 1080 count = numEvents; 1081 } 1082 1083 sendPendingFlushEventsLocked(); 1084 // Early return if there are no events for this connection. 1085 if (count == 0) { 1086 return status_t(NO_ERROR); 1087 } 1088 1089#if DEBUG_CONNECTIONS 1090 mEventsReceived += count; 1091#endif 1092 if (mCacheSize != 0) { 1093 // There are some events in the cache which need to be sent first. Copy this buffer to 1094 // the end of cache. 1095 if (mCacheSize + count <= mMaxCacheSize) { 1096 memcpy(&mEventCache[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1097 mCacheSize += count; 1098 } else { 1099 // Check if any new sensors have registered on this connection which may have increased 1100 // the max cache size that is desired. 1101 if (mCacheSize + count < computeMaxCacheSizeLocked()) { 1102 reAllocateCacheLocked(scratch, count); 1103 return status_t(NO_ERROR); 1104 } 1105 // Some events need to be dropped. 1106 int remaningCacheSize = mMaxCacheSize - mCacheSize; 1107 if (remaningCacheSize != 0) { 1108 memcpy(&mEventCache[mCacheSize], scratch, 1109 remaningCacheSize * sizeof(sensors_event_t)); 1110 } 1111 int numEventsDropped = count - remaningCacheSize; 1112 countFlushCompleteEventsLocked(mEventCache, numEventsDropped); 1113 // Drop the first "numEventsDropped" in the cache. 1114 memmove(mEventCache, &mEventCache[numEventsDropped], 1115 (mCacheSize - numEventsDropped) * sizeof(sensors_event_t)); 1116 1117 // Copy the remainingEvents in scratch buffer to the end of cache. 1118 memcpy(&mEventCache[mCacheSize - numEventsDropped], scratch + remaningCacheSize, 1119 numEventsDropped * sizeof(sensors_event_t)); 1120 } 1121 return status_t(NO_ERROR); 1122 } 1123 1124 int index_wake_up_event = findWakeUpSensorEventLocked(scratch, count); 1125 if (index_wake_up_event >= 0) { 1126 scratch[index_wake_up_event].flags |= WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1127 ++mWakeLockRefCount; 1128 } 1129 1130 // NOTE: ASensorEvent and sensors_event_t are the same type. 1131 ssize_t size = SensorEventQueue::write(mChannel, 1132 reinterpret_cast<ASensorEvent const*>(scratch), count); 1133 if (size < 0) { 1134 // Write error, copy events to local cache. 1135 if (index_wake_up_event >= 0) { 1136 // If there was a wake_up sensor_event, reset the flag. 1137 scratch[index_wake_up_event].flags &= ~WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1138 --mWakeLockRefCount; 1139 } 1140 if (mEventCache == NULL) { 1141 mMaxCacheSize = computeMaxCacheSizeLocked(); 1142 mEventCache = new sensors_event_t[mMaxCacheSize]; 1143 mCacheSize = 0; 1144 } 1145 memcpy(&mEventCache[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1146 mCacheSize += count; 1147 1148 // Add this file descriptor to the looper to get a callback when this fd is available for 1149 // writing. 1150 mService->getLooper()->addFd(mChannel->getSendFd(), 0, 1151 ALOOPER_EVENT_OUTPUT | ALOOPER_EVENT_INPUT, this, NULL); 1152 return size; 1153 } 1154 1155#if DEBUG_CONNECTIONS 1156 if (size > 0) { 1157 mEventsSent += count; 1158 } 1159#endif 1160 1161 return size < 0 ? status_t(size) : status_t(NO_ERROR); 1162} 1163 1164void SensorService::SensorEventConnection::reAllocateCacheLocked(sensors_event_t const* scratch, 1165 int count) { 1166 sensors_event_t *eventCache_new; 1167 const int new_cache_size = computeMaxCacheSizeLocked(); 1168 // Allocate new cache, copy over events from the old cache & scratch, free up memory. 1169 eventCache_new = new sensors_event_t[new_cache_size]; 1170 memcpy(eventCache_new, mEventCache, mCacheSize * sizeof(sensors_event_t)); 1171 memcpy(&eventCache_new[mCacheSize], scratch, count * sizeof(sensors_event_t)); 1172 1173 ALOGD_IF(DEBUG_CONNECTIONS, "reAllocateCacheLocked maxCacheSize=%d %d", mMaxCacheSize, 1174 new_cache_size); 1175 1176 delete mEventCache; 1177 mEventCache = eventCache_new; 1178 mCacheSize += count; 1179 mMaxCacheSize = new_cache_size; 1180} 1181 1182void SensorService::SensorEventConnection::sendPendingFlushEventsLocked() { 1183 ASensorEvent flushCompleteEvent; 1184 flushCompleteEvent.type = SENSOR_TYPE_META_DATA; 1185 flushCompleteEvent.sensor = 0; 1186 // Loop through all the sensors for this connection and check if there are any pending 1187 // flush complete events to be sent. 1188 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1189 FlushInfo& flushInfo = mSensorInfo.editValueAt(i); 1190 while (flushInfo.mPendingFlushEventsToSend > 0) { 1191 flushCompleteEvent.meta_data.sensor = mSensorInfo.keyAt(i); 1192 ssize_t size = SensorEventQueue::write(mChannel, &flushCompleteEvent, 1); 1193 if (size < 0) { 1194 return; 1195 } 1196 ALOGD_IF(DEBUG_CONNECTIONS, "sent dropped flush complete event==%d ", 1197 flushCompleteEvent.meta_data.sensor); 1198 flushInfo.mPendingFlushEventsToSend--; 1199 } 1200 } 1201} 1202 1203void SensorService::SensorEventConnection::writeToSocketFromCacheLocked() { 1204 // At a time write at most half the size of the receiver buffer in SensorEventQueue. 1205 const int maxWriteSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT/2; 1206 sendPendingFlushEventsLocked(); 1207 // Write "count" events at a time. 1208 for (int numEventsSent = 0; numEventsSent < mCacheSize;) { 1209 const int numEventsToWrite = (mCacheSize - numEventsSent) < maxWriteSize ? 1210 mCacheSize - numEventsSent : maxWriteSize; 1211 int index_wake_up_event = 1212 findWakeUpSensorEventLocked(mEventCache + numEventsSent, numEventsToWrite); 1213 if (index_wake_up_event >= 0) { 1214 mEventCache[index_wake_up_event + numEventsSent].flags |= 1215 WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1216 ++mWakeLockRefCount; 1217 } 1218 1219 ssize_t size = SensorEventQueue::write(mChannel, 1220 reinterpret_cast<ASensorEvent const*>(mEventCache + numEventsSent), 1221 numEventsToWrite); 1222 if (size < 0) { 1223 if (index_wake_up_event >= 0) { 1224 // If there was a wake_up sensor_event, reset the flag. 1225 mEventCache[index_wake_up_event + numEventsSent].flags &= 1226 ~WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1227 --mWakeLockRefCount; 1228 } 1229 memmove(mEventCache, &mEventCache[numEventsSent], 1230 (mCacheSize - numEventsSent) * sizeof(sensors_event_t)); 1231 ALOGD_IF(DEBUG_CONNECTIONS, "wrote %d events from cache size==%d ", 1232 numEventsSent, mCacheSize); 1233 mCacheSize -= numEventsSent; 1234 return; 1235 } 1236 numEventsSent += numEventsToWrite; 1237#if DEBUG_CONNECTIONS 1238 mEventsSentFromCache += numEventsToWrite; 1239#endif 1240 } 1241 ALOGD_IF(DEBUG_CONNECTIONS, "wrote all events from cache size=%d ", mCacheSize); 1242 // All events from the cache have been sent. Reset cache size to zero. 1243 mCacheSize = 0; 1244 // Poll only for ALOOPER_EVENT_INPUT(read) on the file descriptor. 1245 mService->getLooper()->addFd(mChannel->getSendFd(), 0, ALOOPER_EVENT_INPUT, this, NULL); 1246} 1247 1248void SensorService::SensorEventConnection::countFlushCompleteEventsLocked( 1249 sensors_event_t* scratch, const int numEventsDropped) { 1250 ALOGD_IF(DEBUG_CONNECTIONS, "dropping %d events ", numEventsDropped); 1251 // Count flushComplete events in the events that are about to the dropped. These will be sent 1252 // separately before the next batch of events. 1253 for (int j = 0; j < numEventsDropped; ++j) { 1254 if (scratch[j].type == SENSOR_TYPE_META_DATA) { 1255 FlushInfo& flushInfo = mSensorInfo.editValueFor(scratch[j].meta_data.sensor); 1256 flushInfo.mPendingFlushEventsToSend++; 1257 ALOGD_IF(DEBUG_CONNECTIONS, "increment pendingFlushCount %d", 1258 flushInfo.mPendingFlushEventsToSend); 1259 } 1260 } 1261 return; 1262} 1263 1264int SensorService::SensorEventConnection::findWakeUpSensorEventLocked( 1265 sensors_event_t const* scratch, const int count) { 1266 for (int i = 0; i < count; ++i) { 1267 if (mService->isWakeUpSensorEvent(scratch[i])) { 1268 return i; 1269 } 1270 } 1271 return -1; 1272} 1273 1274sp<BitTube> SensorService::SensorEventConnection::getSensorChannel() const 1275{ 1276 return mChannel; 1277} 1278 1279status_t SensorService::SensorEventConnection::enableDisable( 1280 int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, 1281 int reservedFlags) 1282{ 1283 status_t err; 1284 if (enabled) { 1285 err = mService->enable(this, handle, samplingPeriodNs, maxBatchReportLatencyNs, 1286 reservedFlags); 1287 1288 } else { 1289 err = mService->disable(this, handle); 1290 } 1291 return err; 1292} 1293 1294status_t SensorService::SensorEventConnection::setEventRate( 1295 int handle, nsecs_t samplingPeriodNs) 1296{ 1297 return mService->setEventRate(this, handle, samplingPeriodNs); 1298} 1299 1300status_t SensorService::SensorEventConnection::flush() { 1301 SensorDevice& dev(SensorDevice::getInstance()); 1302 const int halVersion = dev.getHalDeviceVersion(); 1303 Mutex::Autolock _l(mConnectionLock); 1304 status_t err(NO_ERROR); 1305 // Loop through all sensors for this connection and call flush on each of them. 1306 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1307 const int handle = mSensorInfo.keyAt(i); 1308 FlushInfo& flushInfo = mSensorInfo.editValueFor(handle); 1309 if (halVersion < SENSORS_DEVICE_API_VERSION_1_1 || mService->isVirtualSensor(handle)) { 1310 // For older devices just increment pending flush count which will send a trivial 1311 // flush complete event. 1312 flushInfo.mPendingFlushEventsToSend++; 1313 } else { 1314 status_t err_flush = mService->flushSensor(this, handle); 1315 if (err_flush != NO_ERROR) { 1316 ALOGE("Flush error handle=%d %s", handle, strerror(-err_flush)); 1317 } 1318 err = (err_flush != NO_ERROR) ? err_flush : err; 1319 } 1320 } 1321 return err; 1322} 1323 1324int SensorService::SensorEventConnection::handleEvent(int fd, int events, void* data) { 1325 if (events & ALOOPER_EVENT_HANGUP || events & ALOOPER_EVENT_ERROR) { 1326 return 0; 1327 } 1328 1329 if (events & ALOOPER_EVENT_INPUT) { 1330 char buf; 1331 ssize_t ret = ::recv(fd, &buf, sizeof(buf), MSG_DONTWAIT); 1332 1333 { 1334 Mutex::Autolock _l(mConnectionLock); 1335 --mWakeLockRefCount; 1336 } 1337 // Check if wakelock can be released by sensorservice. mConnectionLock needs to be released 1338 // here as checkWakeLockState() will need it. 1339 if (mWakeLockRefCount == 0) { 1340 mService->checkWakeLockState(); 1341 } 1342 // continue getting callbacks. 1343 return 1; 1344 } 1345 1346 if (events & ALOOPER_EVENT_OUTPUT) { 1347 // send sensor data that is stored in mEventCache. 1348 Mutex::Autolock _l(mConnectionLock); 1349 writeToSocketFromCacheLocked(); 1350 } 1351 return 1; 1352} 1353 1354int SensorService::SensorEventConnection::computeMaxCacheSizeLocked() const { 1355 int fifoWakeUpSensors = 0; 1356 int fifoNonWakeUpSensors = 0; 1357 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1358 const Sensor& sensor = mService->getSensorFromHandle(mSensorInfo.keyAt(i)); 1359 if (sensor.getFifoReservedEventCount() == sensor.getFifoMaxEventCount()) { 1360 // Each sensor has a reserved fifo. Sum up the fifo sizes for all wake up sensors and 1361 // non wake_up sensors. 1362 if (sensor.isWakeUpSensor()) { 1363 fifoWakeUpSensors += sensor.getFifoReservedEventCount(); 1364 } else { 1365 fifoNonWakeUpSensors += sensor.getFifoReservedEventCount(); 1366 } 1367 } else { 1368 // Shared fifo. Compute the max of the fifo sizes for wake_up and non_wake up sensors. 1369 if (sensor.isWakeUpSensor()) { 1370 fifoWakeUpSensors = fifoWakeUpSensors > sensor.getFifoMaxEventCount() ? 1371 fifoWakeUpSensors : sensor.getFifoMaxEventCount(); 1372 1373 } else { 1374 fifoNonWakeUpSensors = fifoNonWakeUpSensors > sensor.getFifoMaxEventCount() ? 1375 fifoNonWakeUpSensors : sensor.getFifoMaxEventCount(); 1376 1377 } 1378 } 1379 } 1380 if (fifoWakeUpSensors + fifoNonWakeUpSensors == 0) { 1381 // It is extremely unlikely that there is a write failure in non batch mode. Return a cache 1382 // size that is equal to that of the batch mode. 1383 ALOGI("Write failure in non-batch mode"); 1384 return MAX_SOCKET_BUFFER_SIZE_BATCHED/sizeof(sensors_event_t); 1385 } 1386 return fifoWakeUpSensors + fifoNonWakeUpSensors; 1387} 1388 1389// --------------------------------------------------------------------------- 1390}; // namespace android 1391 1392