SensorService.cpp revision 0e025c5af365e45e02cb75c1d46b46c7f4cd44cb
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 22#include <cutils/properties.h> 23 24#include <utils/SortedVector.h> 25#include <utils/KeyedVector.h> 26#include <utils/threads.h> 27#include <utils/Atomic.h> 28#include <utils/Errors.h> 29#include <utils/RefBase.h> 30#include <utils/Singleton.h> 31#include <utils/String16.h> 32 33#include <binder/BinderService.h> 34#include <binder/IServiceManager.h> 35#include <binder/PermissionCache.h> 36 37#include <gui/ISensorServer.h> 38#include <gui/ISensorEventConnection.h> 39#include <gui/SensorEventQueue.h> 40 41#include <hardware/sensors.h> 42#include <hardware_legacy/power.h> 43 44#include "BatteryService.h" 45#include "CorrectedGyroSensor.h" 46#include "GravitySensor.h" 47#include "LinearAccelerationSensor.h" 48#include "OrientationSensor.h" 49#include "RotationVectorSensor.h" 50#include "SensorFusion.h" 51#include "SensorService.h" 52 53namespace android { 54// --------------------------------------------------------------------------- 55 56/* 57 * Notes: 58 * 59 * - what about a gyro-corrected magnetic-field sensor? 60 * - run mag sensor from time to time to force calibration 61 * - gravity sensor length is wrong (=> drift in linear-acc sensor) 62 * 63 */ 64 65const char* SensorService::WAKE_LOCK_NAME = "SensorService"; 66 67SensorService::SensorService() 68 : mInitCheck(NO_INIT) 69{ 70} 71 72void SensorService::onFirstRef() 73{ 74 ALOGD("nuSensorService starting..."); 75 76 SensorDevice& dev(SensorDevice::getInstance()); 77 78 if (dev.initCheck() == NO_ERROR) { 79 sensor_t const* list; 80 ssize_t count = dev.getSensorList(&list); 81 if (count > 0) { 82 ssize_t orientationIndex = -1; 83 bool hasGyro = false; 84 uint32_t virtualSensorsNeeds = 85 (1<<SENSOR_TYPE_GRAVITY) | 86 (1<<SENSOR_TYPE_LINEAR_ACCELERATION) | 87 (1<<SENSOR_TYPE_ROTATION_VECTOR); 88 89 mLastEventSeen.setCapacity(count); 90 for (ssize_t i=0 ; i<count ; i++) { 91 registerSensor( new HardwareSensor(list[i]) ); 92 switch (list[i].type) { 93 case SENSOR_TYPE_ORIENTATION: 94 orientationIndex = i; 95 break; 96 case SENSOR_TYPE_GYROSCOPE: 97 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 98 hasGyro = true; 99 break; 100 case SENSOR_TYPE_GRAVITY: 101 case SENSOR_TYPE_LINEAR_ACCELERATION: 102 case SENSOR_TYPE_ROTATION_VECTOR: 103 virtualSensorsNeeds &= ~(1<<list[i].type); 104 break; 105 } 106 } 107 108 // it's safe to instantiate the SensorFusion object here 109 // (it wants to be instantiated after h/w sensors have been 110 // registered) 111 const SensorFusion& fusion(SensorFusion::getInstance()); 112 113 // build the sensor list returned to users 114 mUserSensorList = mSensorList; 115 116 if (hasGyro) { 117 Sensor aSensor; 118 119 // Add Android virtual sensors if they're not already 120 // available in the HAL 121 122 aSensor = registerVirtualSensor( new RotationVectorSensor() ); 123 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) { 124 mUserSensorList.add(aSensor); 125 } 126 127 aSensor = registerVirtualSensor( new GravitySensor(list, count) ); 128 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_GRAVITY)) { 129 mUserSensorList.add(aSensor); 130 } 131 132 aSensor = registerVirtualSensor( new LinearAccelerationSensor(list, count) ); 133 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_LINEAR_ACCELERATION)) { 134 mUserSensorList.add(aSensor); 135 } 136 137 aSensor = registerVirtualSensor( new OrientationSensor() ); 138 if (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) { 139 // if we are doing our own rotation-vector, also add 140 // the orientation sensor and remove the HAL provided one. 141 mUserSensorList.replaceAt(aSensor, orientationIndex); 142 } 143 144 // virtual debugging sensors are not added to mUserSensorList 145 registerVirtualSensor( new CorrectedGyroSensor(list, count) ); 146 registerVirtualSensor( new GyroDriftSensor() ); 147 } 148 149 // debugging sensor list 150 mUserSensorListDebug = mSensorList; 151 152 mSocketBufferSize = SOCKET_BUFFER_SIZE_NON_BATCHED; 153 FILE *fp = fopen("/proc/sys/net/core/wmem_max", "r"); 154 char line[128]; 155 if (fp != NULL && fgets(line, sizeof(line), fp) != NULL) { 156 line[sizeof(line) - 1] = '\0'; 157 sscanf(line, "%zu", &mSocketBufferSize); 158 if (mSocketBufferSize > MAX_SOCKET_BUFFER_SIZE_BATCHED) { 159 mSocketBufferSize = MAX_SOCKET_BUFFER_SIZE_BATCHED; 160 } 161 } 162 if (fp) { 163 fclose(fp); 164 } 165 166 mWakeLockAcquired = false; 167 run("SensorService", PRIORITY_URGENT_DISPLAY); 168 mInitCheck = NO_ERROR; 169 } 170 } 171} 172 173Sensor SensorService::registerSensor(SensorInterface* s) 174{ 175 sensors_event_t event; 176 memset(&event, 0, sizeof(event)); 177 178 const Sensor sensor(s->getSensor()); 179 // add to the sensor list (returned to clients) 180 mSensorList.add(sensor); 181 // add to our handle->SensorInterface mapping 182 mSensorMap.add(sensor.getHandle(), s); 183 // create an entry in the mLastEventSeen array 184 mLastEventSeen.add(sensor.getHandle(), event); 185 186 return sensor; 187} 188 189Sensor SensorService::registerVirtualSensor(SensorInterface* s) 190{ 191 Sensor sensor = registerSensor(s); 192 mVirtualSensorList.add( s ); 193 return sensor; 194} 195 196SensorService::~SensorService() 197{ 198 for (size_t i=0 ; i<mSensorMap.size() ; i++) 199 delete mSensorMap.valueAt(i); 200} 201 202static const String16 sDump("android.permission.DUMP"); 203 204status_t SensorService::dump(int fd, const Vector<String16>& /*args*/) 205{ 206 String8 result; 207 if (!PermissionCache::checkCallingPermission(sDump)) { 208 result.appendFormat("Permission Denial: " 209 "can't dump SensorService from pid=%d, uid=%d\n", 210 IPCThreadState::self()->getCallingPid(), 211 IPCThreadState::self()->getCallingUid()); 212 } else { 213 Mutex::Autolock _l(mLock); 214 result.append("Sensor List:\n"); 215 for (size_t i=0 ; i<mSensorList.size() ; i++) { 216 const Sensor& s(mSensorList[i]); 217 const sensors_event_t& e(mLastEventSeen.valueFor(s.getHandle())); 218 result.appendFormat( 219 "%-48s| %-32s| %-48s| 0x%08x | \"%s\"\n\t", 220 s.getName().string(), 221 s.getVendor().string(), 222 s.getStringType().string(), 223 s.getHandle(), 224 s.getRequiredPermission().string()); 225 226 const int reportingMode = s.getReportingMode(); 227 if (reportingMode == AREPORTING_MODE_CONTINUOUS) { 228 result.append("continuous |"); 229 } else if (reportingMode == AREPORTING_MODE_ON_CHANGE) { 230 result.append("on-change | "); 231 } else if (reportingMode == AREPORTING_MODE_ONE_SHOT) { 232 result.append("one-shot | "); 233 } else { 234 result.append("special-trigger | "); 235 } 236 237 if (s.getMinDelay() > 0) { 238 result.appendFormat("maxRate=%7.2fHz | ", 1e6f / s.getMinDelay()); 239 } else { 240 result.appendFormat("minDelay=%5dus |", s.getMinDelay()); 241 } 242 243 if (s.getFifoMaxEventCount() > 0) { 244 result.appendFormat("FifoMax=%d events | ", 245 s.getFifoMaxEventCount()); 246 } else { 247 result.append("no batching support | "); 248 } 249 250 switch (s.getType()) { 251 case SENSOR_TYPE_ROTATION_VECTOR: 252 case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR: 253 result.appendFormat( 254 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f>\n", 255 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4]); 256 break; 257 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED: 258 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 259 result.appendFormat( 260 "last=<%5.1f,%5.1f,%5.1f,%5.1f,%5.1f,%5.1f>\n", 261 e.data[0], e.data[1], e.data[2], e.data[3], e.data[4], e.data[5]); 262 break; 263 case SENSOR_TYPE_GAME_ROTATION_VECTOR: 264 result.appendFormat( 265 "last=<%5.1f,%5.1f,%5.1f,%5.1f>\n", 266 e.data[0], e.data[1], e.data[2], e.data[3]); 267 break; 268 case SENSOR_TYPE_SIGNIFICANT_MOTION: 269 case SENSOR_TYPE_STEP_DETECTOR: 270 result.appendFormat( "last=<%f>\n", e.data[0]); 271 break; 272 case SENSOR_TYPE_STEP_COUNTER: 273 result.appendFormat( "last=<%" PRIu64 ">\n", e.u64.step_counter); 274 break; 275 default: 276 // default to 3 values 277 result.appendFormat( 278 "last=<%5.1f,%5.1f,%5.1f>\n", 279 e.data[0], e.data[1], e.data[2]); 280 break; 281 } 282 } 283 SensorFusion::getInstance().dump(result); 284 SensorDevice::getInstance().dump(result); 285 286 result.append("Active sensors:\n"); 287 for (size_t i=0 ; i<mActiveSensors.size() ; i++) { 288 int handle = mActiveSensors.keyAt(i); 289 result.appendFormat("%s (handle=0x%08x, connections=%zu)\n", 290 getSensorName(handle).string(), 291 handle, 292 mActiveSensors.valueAt(i)->getNumConnections()); 293 } 294 295 result.appendFormat("%zu Max Socket Buffer size\n", mSocketBufferSize); 296 result.appendFormat("WakeLock Status: %s \n", mWakeLockAcquired ? "acquired" : "not held"); 297 result.appendFormat("%zd active connections\n", mActiveConnections.size()); 298 299 for (size_t i=0 ; i < mActiveConnections.size() ; i++) { 300 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 301 if (connection != 0) { 302 result.appendFormat("Connection Number: %zu \n", i); 303 connection->dump(result); 304 } 305 } 306 } 307 write(fd, result.string(), result.size()); 308 return NO_ERROR; 309} 310 311void SensorService::cleanupAutoDisabledSensorLocked(const sp<SensorEventConnection>& connection, 312 sensors_event_t const* buffer, const int count) { 313 for (int i=0 ; i<count ; i++) { 314 int handle = buffer[i].sensor; 315 if (connection->hasSensor(handle)) { 316 SensorInterface* sensor = mSensorMap.valueFor(handle); 317 // If this buffer has an event from a one_shot sensor and this connection is registered 318 // for this particular one_shot sensor, try cleaning up the connection. 319 if (sensor != NULL && 320 sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 321 sensor->autoDisable(connection.get(), handle); 322 cleanupWithoutDisableLocked(connection, handle); 323 } 324 } 325 } 326} 327 328bool SensorService::threadLoop() 329{ 330 ALOGD("nuSensorService thread starting..."); 331 332 // each virtual sensor could generate an event per "real" event, that's why we need 333 // to size numEventMax much smaller than MAX_RECEIVE_BUFFER_EVENT_COUNT. 334 // in practice, this is too aggressive, but guaranteed to be enough. 335 const size_t minBufferSize = SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT; 336 const size_t numEventMax = minBufferSize / (1 + mVirtualSensorList.size()); 337 338 sensors_event_t buffer[minBufferSize]; 339 sensors_event_t scratch[minBufferSize]; 340 SensorDevice& device(SensorDevice::getInstance()); 341 const size_t vcount = mVirtualSensorList.size(); 342 343 ssize_t count; 344 const int halVersion = device.getHalDeviceVersion(); 345 do { 346 count = device.poll(buffer, numEventMax); 347 if (count<0) { 348 ALOGE("sensor poll failed (%s)", strerror(-count)); 349 break; 350 } 351 Mutex::Autolock _l(mLock); 352 // Poll has returned. Hold a wakelock if one of the events is from a wake up sensor. The 353 // rest of this loop is under a critical section protected by mLock. Acquiring a wakeLock, 354 // sending events to clients (incrementing SensorEventConnection::mWakeLockRefCount) should 355 // not be interleaved with decrementing SensorEventConnection::mWakeLockRefCount and 356 // releasing the wakelock. 357 bool bufferHasWakeUpEvent = false; 358 for (int i = 0; i < count; i++) { 359 if (isWakeUpSensorEvent(buffer[i])) { 360 bufferHasWakeUpEvent = true; 361 break; 362 } 363 } 364 365 if (bufferHasWakeUpEvent && !mWakeLockAcquired) { 366 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 367 mWakeLockAcquired = true; 368 ALOGD_IF(DEBUG_CONNECTIONS, "acquired wakelock %s", WAKE_LOCK_NAME); 369 } 370 recordLastValueLocked(buffer, count); 371 372 // handle virtual sensors 373 if (count && vcount) { 374 sensors_event_t const * const event = buffer; 375 const size_t activeVirtualSensorCount = mActiveVirtualSensors.size(); 376 if (activeVirtualSensorCount) { 377 size_t k = 0; 378 SensorFusion& fusion(SensorFusion::getInstance()); 379 if (fusion.isEnabled()) { 380 for (size_t i=0 ; i<size_t(count) ; i++) { 381 fusion.process(event[i]); 382 } 383 } 384 for (size_t i=0 ; i<size_t(count) && k<minBufferSize ; i++) { 385 for (size_t j=0 ; j<activeVirtualSensorCount ; j++) { 386 if (count + k >= minBufferSize) { 387 ALOGE("buffer too small to hold all events: " 388 "count=%u, k=%u, size=%u", 389 count, k, minBufferSize); 390 break; 391 } 392 sensors_event_t out; 393 SensorInterface* si = mActiveVirtualSensors.valueAt(j); 394 if (si->process(&out, event[i])) { 395 buffer[count + k] = out; 396 k++; 397 } 398 } 399 } 400 if (k) { 401 // record the last synthesized values 402 recordLastValueLocked(&buffer[count], k); 403 count += k; 404 // sort the buffer by time-stamps 405 sortEventBuffer(buffer, count); 406 } 407 } 408 } 409 410 // handle backward compatibility for RotationVector sensor 411 if (halVersion < SENSORS_DEVICE_API_VERSION_1_0) { 412 for (int i = 0; i < count; i++) { 413 if (buffer[i].type == SENSOR_TYPE_ROTATION_VECTOR) { 414 // All the 4 components of the quaternion should be available 415 // No heading accuracy. Set it to -1 416 buffer[i].data[4] = -1; 417 } 418 } 419 } 420 421 // Send our events to clients. Check the state of wake lock for each client and release the 422 // lock if none of the clients need it. 423 bool needsWakeLock = false; 424 for (size_t i=0 ; i < mActiveConnections.size(); i++) { 425 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 426 if (connection != 0) { 427 connection->sendEvents(buffer, count, scratch); 428 needsWakeLock |= connection->needsWakeLock(); 429 // Some sensors need to be auto disabled after the trigger 430 cleanupAutoDisabledSensorLocked(connection, buffer, count); 431 } 432 } 433 434 if (mWakeLockAcquired && !needsWakeLock) { 435 release_wake_lock(WAKE_LOCK_NAME); 436 mWakeLockAcquired = false; 437 ALOGD_IF(DEBUG_CONNECTIONS, "released wakelock %s", WAKE_LOCK_NAME); 438 } 439 } while (count >= 0 || Thread::exitPending()); 440 441 ALOGW("Exiting SensorService::threadLoop => aborting..."); 442 abort(); 443 return false; 444} 445 446void SensorService::recordLastValueLocked( 447 const sensors_event_t* buffer, size_t count) { 448 const sensors_event_t* last = NULL; 449 for (size_t i = 0; i < count; i++) { 450 const sensors_event_t* event = &buffer[i]; 451 if (event->type != SENSOR_TYPE_META_DATA) { 452 if (last && event->sensor != last->sensor) { 453 mLastEventSeen.editValueFor(last->sensor) = *last; 454 } 455 last = event; 456 } 457 } 458 if (last) { 459 mLastEventSeen.editValueFor(last->sensor) = *last; 460 } 461} 462 463void SensorService::sortEventBuffer(sensors_event_t* buffer, size_t count) 464{ 465 struct compar { 466 static int cmp(void const* lhs, void const* rhs) { 467 sensors_event_t const* l = static_cast<sensors_event_t const*>(lhs); 468 sensors_event_t const* r = static_cast<sensors_event_t const*>(rhs); 469 return l->timestamp - r->timestamp; 470 } 471 }; 472 qsort(buffer, count, sizeof(sensors_event_t), compar::cmp); 473} 474 475String8 SensorService::getSensorName(int handle) const { 476 size_t count = mUserSensorList.size(); 477 for (size_t i=0 ; i<count ; i++) { 478 const Sensor& sensor(mUserSensorList[i]); 479 if (sensor.getHandle() == handle) { 480 return sensor.getName(); 481 } 482 } 483 String8 result("unknown"); 484 return result; 485} 486 487bool SensorService::isVirtualSensor(int handle) const { 488 SensorInterface* sensor = mSensorMap.valueFor(handle); 489 return sensor->isVirtual(); 490} 491 492bool SensorService::isWakeUpSensorEvent(const sensors_event_t& event) const { 493 SensorInterface* sensor = mSensorMap.valueFor(event.sensor); 494 return sensor->getSensor().isWakeUpSensor(); 495} 496 497Vector<Sensor> SensorService::getSensorList() 498{ 499 char value[PROPERTY_VALUE_MAX]; 500 property_get("debug.sensors", value, "0"); 501 const Vector<Sensor>& initialSensorList = (atoi(value)) ? 502 mUserSensorListDebug : mUserSensorList; 503 Vector<Sensor> accessibleSensorList; 504 for (size_t i = 0; i < initialSensorList.size(); i++) { 505 Sensor sensor = initialSensorList[i]; 506 if (canAccessSensor(sensor)) { 507 accessibleSensorList.add(sensor); 508 } else { 509 String8 infoMessage; 510 infoMessage.appendFormat( 511 "Skipped sensor %s because it requires permission %s", 512 sensor.getName().string(), 513 sensor.getRequiredPermission().string()); 514 ALOGI(infoMessage.string()); 515 } 516 } 517 return accessibleSensorList; 518} 519 520sp<ISensorEventConnection> SensorService::createSensorEventConnection() 521{ 522 uid_t uid = IPCThreadState::self()->getCallingUid(); 523 sp<SensorEventConnection> result(new SensorEventConnection(this, uid)); 524 return result; 525} 526 527void SensorService::cleanupConnection(SensorEventConnection* c) 528{ 529 Mutex::Autolock _l(mLock); 530 const wp<SensorEventConnection> connection(c); 531 size_t size = mActiveSensors.size(); 532 ALOGD_IF(DEBUG_CONNECTIONS, "%d active sensors", size); 533 for (size_t i=0 ; i<size ; ) { 534 int handle = mActiveSensors.keyAt(i); 535 if (c->hasSensor(handle)) { 536 ALOGD_IF(DEBUG_CONNECTIONS, "%i: disabling handle=0x%08x", i, handle); 537 SensorInterface* sensor = mSensorMap.valueFor( handle ); 538 ALOGE_IF(!sensor, "mSensorMap[handle=0x%08x] is null!", handle); 539 if (sensor) { 540 sensor->activate(c, false); 541 } 542 } 543 SensorRecord* rec = mActiveSensors.valueAt(i); 544 ALOGE_IF(!rec, "mActiveSensors[%d] is null (handle=0x%08x)!", i, handle); 545 ALOGD_IF(DEBUG_CONNECTIONS, 546 "removing connection %p for sensor[%d].handle=0x%08x", 547 c, i, handle); 548 549 if (rec && rec->removeConnection(connection)) { 550 ALOGD_IF(DEBUG_CONNECTIONS, "... and it was the last connection"); 551 mActiveSensors.removeItemsAt(i, 1); 552 mActiveVirtualSensors.removeItem(handle); 553 delete rec; 554 size--; 555 } else { 556 i++; 557 } 558 } 559 mActiveConnections.remove(connection); 560 BatteryService::cleanup(c->getUid()); 561 if (c->needsWakeLock()) { 562 checkWakeLockStateLocked(); 563 } 564} 565 566Sensor SensorService::getSensorFromHandle(int handle) const { 567 return mSensorMap.valueFor(handle)->getSensor(); 568} 569 570status_t SensorService::enable(const sp<SensorEventConnection>& connection, 571 int handle, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, int reservedFlags) 572{ 573 if (mInitCheck != NO_ERROR) 574 return mInitCheck; 575 576 SensorInterface* sensor = mSensorMap.valueFor(handle); 577 if (sensor == NULL) { 578 return BAD_VALUE; 579 } 580 581 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried enabling")) { 582 return BAD_VALUE; 583 } 584 585 Mutex::Autolock _l(mLock); 586 SensorRecord* rec = mActiveSensors.valueFor(handle); 587 if (rec == 0) { 588 rec = new SensorRecord(connection); 589 mActiveSensors.add(handle, rec); 590 if (sensor->isVirtual()) { 591 mActiveVirtualSensors.add(handle, sensor); 592 } 593 } else { 594 if (rec->addConnection(connection)) { 595 // this sensor is already activated, but we are adding a connection that uses it. 596 // Immediately send down the last known value of the requested sensor if it's not a 597 // "continuous" sensor. 598 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ON_CHANGE) { 599 // NOTE: The wake_up flag of this event may get set to 600 // WAKE_UP_SENSOR_EVENT_NEEDS_ACK if this is a wake_up event. 601 sensors_event_t& event(mLastEventSeen.editValueFor(handle)); 602 if (event.version == sizeof(sensors_event_t)) { 603 if (isWakeUpSensorEvent(event) && !mWakeLockAcquired) { 604 acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME); 605 mWakeLockAcquired = true; 606 ALOGD_IF(DEBUG_CONNECTIONS, "acquired wakelock for on_change sensor %s", 607 WAKE_LOCK_NAME); 608 } 609 connection->sendEvents(&event, 1, NULL); 610 if (!connection->needsWakeLock() && mWakeLockAcquired) { 611 checkWakeLockStateLocked(); 612 } 613 } 614 } 615 } 616 } 617 618 if (connection->addSensor(handle)) { 619 BatteryService::enableSensor(connection->getUid(), handle); 620 // the sensor was added (which means it wasn't already there) 621 // so, see if this connection becomes active 622 if (mActiveConnections.indexOf(connection) < 0) { 623 mActiveConnections.add(connection); 624 } 625 } else { 626 ALOGW("sensor %08x already enabled in connection %p (ignoring)", 627 handle, connection.get()); 628 } 629 630 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 631 if (samplingPeriodNs < minDelayNs) { 632 samplingPeriodNs = minDelayNs; 633 } 634 635 ALOGD_IF(DEBUG_CONNECTIONS, "Calling batch handle==%d flags=%d rate=%lld timeout== %lld", 636 handle, reservedFlags, samplingPeriodNs, maxBatchReportLatencyNs); 637 638 status_t err = sensor->batch(connection.get(), handle, reservedFlags, samplingPeriodNs, 639 maxBatchReportLatencyNs); 640 if (err == NO_ERROR) { 641 connection->setFirstFlushPending(handle, true); 642 status_t err_flush = sensor->flush(connection.get(), handle); 643 // Flush may return error if the sensor is not activated or the underlying h/w sensor does 644 // not support flush. 645 if (err_flush != NO_ERROR) { 646 connection->setFirstFlushPending(handle, false); 647 } 648 } 649 650 if (err == NO_ERROR) { 651 ALOGD_IF(DEBUG_CONNECTIONS, "Calling activate on %d", handle); 652 err = sensor->activate(connection.get(), true); 653 } 654 655 if (err != NO_ERROR) { 656 // batch/activate has failed, reset our state. 657 cleanupWithoutDisableLocked(connection, handle); 658 } 659 return err; 660} 661 662status_t SensorService::disable(const sp<SensorEventConnection>& connection, 663 int handle) 664{ 665 if (mInitCheck != NO_ERROR) 666 return mInitCheck; 667 668 Mutex::Autolock _l(mLock); 669 status_t err = cleanupWithoutDisableLocked(connection, handle); 670 if (err == NO_ERROR) { 671 SensorInterface* sensor = mSensorMap.valueFor(handle); 672 err = sensor ? sensor->activate(connection.get(), false) : status_t(BAD_VALUE); 673 } 674 return err; 675} 676 677status_t SensorService::cleanupWithoutDisable( 678 const sp<SensorEventConnection>& connection, int handle) { 679 Mutex::Autolock _l(mLock); 680 return cleanupWithoutDisableLocked(connection, handle); 681} 682 683status_t SensorService::cleanupWithoutDisableLocked( 684 const sp<SensorEventConnection>& connection, int handle) { 685 SensorRecord* rec = mActiveSensors.valueFor(handle); 686 if (rec) { 687 // see if this connection becomes inactive 688 if (connection->removeSensor(handle)) { 689 BatteryService::disableSensor(connection->getUid(), handle); 690 } 691 if (connection->hasAnySensor() == false) { 692 mActiveConnections.remove(connection); 693 } 694 // see if this sensor becomes inactive 695 if (rec->removeConnection(connection)) { 696 mActiveSensors.removeItem(handle); 697 mActiveVirtualSensors.removeItem(handle); 698 delete rec; 699 } 700 return NO_ERROR; 701 } 702 return BAD_VALUE; 703} 704 705status_t SensorService::setEventRate(const sp<SensorEventConnection>& connection, 706 int handle, nsecs_t ns) 707{ 708 if (mInitCheck != NO_ERROR) 709 return mInitCheck; 710 711 SensorInterface* sensor = mSensorMap.valueFor(handle); 712 if (!sensor) 713 return BAD_VALUE; 714 715 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried configuring")) { 716 return BAD_VALUE; 717 } 718 719 if (ns < 0) 720 return BAD_VALUE; 721 722 nsecs_t minDelayNs = sensor->getSensor().getMinDelayNs(); 723 if (ns < minDelayNs) { 724 ns = minDelayNs; 725 } 726 727 return sensor->setDelay(connection.get(), handle, ns); 728} 729 730status_t SensorService::flushSensor(const sp<SensorEventConnection>& connection, 731 int handle) { 732 if (mInitCheck != NO_ERROR) return mInitCheck; 733 SensorInterface* sensor = mSensorMap.valueFor(handle); 734 if (sensor == NULL) { 735 return BAD_VALUE; 736 } 737 738 if (!verifyCanAccessSensor(sensor->getSensor(), "Tried flushing")) { 739 return BAD_VALUE; 740 } 741 742 if (sensor->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) { 743 ALOGE("flush called on a one-shot sensor"); 744 return INVALID_OPERATION; 745 } 746 return sensor->flush(connection.get(), handle); 747} 748 749 750bool SensorService::canAccessSensor(const Sensor& sensor) { 751 String16 permissionString(sensor.getRequiredPermission()); 752 return permissionString.size() == 0 || 753 PermissionCache::checkCallingPermission(permissionString); 754} 755 756bool SensorService::verifyCanAccessSensor(const Sensor& sensor, const char* operation) { 757 if (canAccessSensor(sensor)) { 758 return true; 759 } else { 760 String8 errorMessage; 761 errorMessage.appendFormat( 762 "%s a sensor (%s) without holding its required permission: %s", 763 operation, 764 sensor.getName().string(), 765 sensor.getRequiredPermission().string()); 766 return false; 767 } 768} 769 770void SensorService::checkWakeLockState() { 771 Mutex::Autolock _l(mLock); 772 checkWakeLockStateLocked(); 773} 774 775void SensorService::checkWakeLockStateLocked() { 776 if (!mWakeLockAcquired) { 777 return; 778 } 779 bool releaseLock = true; 780 for (size_t i=0 ; i<mActiveConnections.size() ; i++) { 781 sp<SensorEventConnection> connection(mActiveConnections[i].promote()); 782 if (connection != 0) { 783 if (connection->needsWakeLock()) { 784 releaseLock = false; 785 break; 786 } 787 } 788 } 789 if (releaseLock) { 790 ALOGD_IF(DEBUG_CONNECTIONS, "releasing wakelock %s", WAKE_LOCK_NAME); 791 release_wake_lock(WAKE_LOCK_NAME); 792 mWakeLockAcquired = false; 793 } 794} 795// --------------------------------------------------------------------------- 796 797SensorService::SensorRecord::SensorRecord( 798 const sp<SensorEventConnection>& connection) 799{ 800 mConnections.add(connection); 801} 802 803bool SensorService::SensorRecord::addConnection( 804 const sp<SensorEventConnection>& connection) 805{ 806 if (mConnections.indexOf(connection) < 0) { 807 mConnections.add(connection); 808 return true; 809 } 810 return false; 811} 812 813bool SensorService::SensorRecord::removeConnection( 814 const wp<SensorEventConnection>& connection) 815{ 816 ssize_t index = mConnections.indexOf(connection); 817 if (index >= 0) { 818 mConnections.removeItemsAt(index, 1); 819 } 820 return mConnections.size() ? false : true; 821} 822 823// --------------------------------------------------------------------------- 824 825SensorService::SensorEventConnection::SensorEventConnection( 826 const sp<SensorService>& service, uid_t uid) 827 : mService(service), mUid(uid), mWakeLockRefCount(0) 828{ 829 const SensorDevice& device(SensorDevice::getInstance()); 830 if (device.getHalDeviceVersion() >= SENSORS_DEVICE_API_VERSION_1_1) { 831 // Increase socket buffer size to 1MB for batching capabilities. 832 mChannel = new BitTube(service->mSocketBufferSize); 833 } else { 834 mChannel = new BitTube(SOCKET_BUFFER_SIZE_NON_BATCHED); 835 } 836} 837 838SensorService::SensorEventConnection::~SensorEventConnection() 839{ 840 ALOGD_IF(DEBUG_CONNECTIONS, "~SensorEventConnection(%p)", this); 841 mService->cleanupConnection(this); 842} 843 844void SensorService::SensorEventConnection::onFirstRef() 845{ 846} 847 848bool SensorService::SensorEventConnection::needsWakeLock() { 849 Mutex::Autolock _l(mConnectionLock); 850 return mWakeLockRefCount > 0; 851} 852 853void SensorService::SensorEventConnection::dump(String8& result) { 854 Mutex::Autolock _l(mConnectionLock); 855 result.appendFormat("%d WakeLockRefCount\n", mWakeLockRefCount); 856 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 857 const FlushInfo& flushInfo = mSensorInfo.valueAt(i); 858 result.appendFormat("\t %s | status: %s | pending flush events %d | uid %d\n", 859 mService->getSensorName(mSensorInfo.keyAt(i)).string(), 860 flushInfo.mFirstFlushPending ? "First flush pending" : 861 "active", 862 flushInfo.mPendingFlushEventsToSend, 863 mUid); 864 } 865} 866 867bool SensorService::SensorEventConnection::addSensor(int32_t handle) { 868 Mutex::Autolock _l(mConnectionLock); 869 if (!verifyCanAccessSensor(mService->getSensorFromHandle(handle), "Tried adding")) { 870 return false; 871 } 872 if (mSensorInfo.indexOfKey(handle) < 0) { 873 mSensorInfo.add(handle, FlushInfo()); 874 return true; 875 } 876 return false; 877} 878 879bool SensorService::SensorEventConnection::removeSensor(int32_t handle) { 880 Mutex::Autolock _l(mConnectionLock); 881 if (mSensorInfo.removeItem(handle) >= 0) { 882 return true; 883 } 884 return false; 885} 886 887bool SensorService::SensorEventConnection::hasSensor(int32_t handle) const { 888 Mutex::Autolock _l(mConnectionLock); 889 return mSensorInfo.indexOfKey(handle) >= 0; 890} 891 892bool SensorService::SensorEventConnection::hasAnySensor() const { 893 Mutex::Autolock _l(mConnectionLock); 894 return mSensorInfo.size() ? true : false; 895} 896 897void SensorService::SensorEventConnection::setFirstFlushPending(int32_t handle, 898 bool value) { 899 Mutex::Autolock _l(mConnectionLock); 900 ssize_t index = mSensorInfo.indexOfKey(handle); 901 if (index >= 0) { 902 FlushInfo& flushInfo = mSensorInfo.editValueAt(index); 903 flushInfo.mFirstFlushPending = value; 904 } 905} 906 907status_t SensorService::SensorEventConnection::sendEvents( 908 sensors_event_t const* buffer, size_t numEvents, 909 sensors_event_t* scratch) 910{ 911 // filter out events not for this connection 912 size_t count = 0; 913 Mutex::Autolock _l(mConnectionLock); 914 if (scratch) { 915 size_t i=0; 916 while (i<numEvents) { 917 int32_t curr = buffer[i].sensor; 918 if (buffer[i].type == SENSOR_TYPE_META_DATA) { 919 ALOGD_IF(DEBUG_CONNECTIONS, "flush complete event sensor==%d ", 920 buffer[i].meta_data.sensor); 921 // Setting curr to the correct sensor to ensure the sensor events per connection are 922 // filtered correctly. buffer[i].sensor is zero for meta_data events. 923 curr = buffer[i].meta_data.sensor; 924 } 925 ssize_t index = mSensorInfo.indexOfKey(curr); 926 if (index >= 0 && mSensorInfo[index].mFirstFlushPending == true && 927 buffer[i].type == SENSOR_TYPE_META_DATA) { 928 // This is the first flush before activate is called. Events can now be sent for 929 // this sensor on this connection. 930 ALOGD_IF(DEBUG_CONNECTIONS, "First flush event for sensor==%d ", 931 buffer[i].meta_data.sensor); 932 mSensorInfo.editValueAt(index).mFirstFlushPending = false; 933 } 934 if (index >= 0 && mSensorInfo[index].mFirstFlushPending == false) { 935 do { 936 scratch[count++] = buffer[i++]; 937 } while ((i<numEvents) && ((buffer[i].sensor == curr) || 938 (buffer[i].type == SENSOR_TYPE_META_DATA && 939 buffer[i].meta_data.sensor == curr))); 940 } else { 941 i++; 942 } 943 } 944 } else { 945 scratch = const_cast<sensors_event_t *>(buffer); 946 count = numEvents; 947 } 948 949 // Send pending flush events (if any) before sending events from the cache. 950 { 951 ASensorEvent flushCompleteEvent; 952 flushCompleteEvent.type = SENSOR_TYPE_META_DATA; 953 flushCompleteEvent.sensor = 0; 954 // Loop through all the sensors for this connection and check if there are any pending 955 // flush complete events to be sent. 956 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 957 FlushInfo& flushInfo = mSensorInfo.editValueAt(i); 958 while (flushInfo.mPendingFlushEventsToSend > 0) { 959 flushCompleteEvent.meta_data.sensor = mSensorInfo.keyAt(i); 960 ssize_t size = SensorEventQueue::write(mChannel, &flushCompleteEvent, 1); 961 if (size < 0) { 962 // ALOGW("dropping %d events on the floor", count); 963 countFlushCompleteEventsLocked(scratch, count); 964 return size; 965 } 966 ALOGD_IF(DEBUG_CONNECTIONS, "sent dropped flush complete event==%d ", 967 flushCompleteEvent.meta_data.sensor); 968 flushInfo.mPendingFlushEventsToSend--; 969 } 970 } 971 } 972 973 // Early return if there are no events for this connection. 974 if (count == 0) { 975 return status_t(NO_ERROR); 976 } 977 978 int numWakeUpSensorEvents = countWakeUpSensorEventsLocked(scratch, count); 979 // NOTE: ASensorEvent and sensors_event_t are the same type 980 ssize_t size = SensorEventQueue::write(mChannel, 981 reinterpret_cast<ASensorEvent const*>(scratch), count); 982 if (size == -EAGAIN) { 983 // the destination doesn't accept events anymore, it's probably 984 // full. For now, we just drop the events on the floor. 985 // ALOGW("dropping %d events on the floor", count); 986 countFlushCompleteEventsLocked(scratch, count); 987 mWakeLockRefCount -= numWakeUpSensorEvents; 988 return size; 989 } 990 return size < 0 ? status_t(size) : status_t(NO_ERROR); 991} 992 993void SensorService::SensorEventConnection::countFlushCompleteEventsLocked( 994 sensors_event_t* scratch, const int numEventsDropped) { 995 ALOGD_IF(DEBUG_CONNECTIONS, "dropping %d events ", numEventsDropped); 996 // Count flushComplete events in the events that are about to the dropped. These will be sent 997 // separately before the next batch of events. 998 for (int j = 0; j < numEventsDropped; ++j) { 999 if (scratch[j].type == SENSOR_TYPE_META_DATA) { 1000 FlushInfo& flushInfo = mSensorInfo.editValueFor(scratch[j].meta_data.sensor); 1001 flushInfo.mPendingFlushEventsToSend++; 1002 ALOGD_IF(DEBUG_CONNECTIONS, "increment pendingFlushCount %d", 1003 flushInfo.mPendingFlushEventsToSend); 1004 } 1005 } 1006 return; 1007} 1008 1009int SensorService::SensorEventConnection::countWakeUpSensorEventsLocked( 1010 sensors_event_t* scratch, const int count) { 1011 for (int i = 0; i < count; ++i) { 1012 if (mService->isWakeUpSensorEvent(scratch[i])) { 1013 scratch[i].flags |= WAKE_UP_SENSOR_EVENT_NEEDS_ACK; 1014 ++mWakeLockRefCount; 1015 return 1; 1016 } 1017 } 1018 return 0; 1019} 1020 1021sp<BitTube> SensorService::SensorEventConnection::getSensorChannel() const 1022{ 1023 return mChannel; 1024} 1025 1026status_t SensorService::SensorEventConnection::enableDisable( 1027 int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, 1028 int reservedFlags) 1029{ 1030 status_t err; 1031 if (enabled) { 1032 err = mService->enable(this, handle, samplingPeriodNs, maxBatchReportLatencyNs, 1033 reservedFlags); 1034 } else { 1035 err = mService->disable(this, handle); 1036 } 1037 return err; 1038} 1039 1040status_t SensorService::SensorEventConnection::setEventRate( 1041 int handle, nsecs_t samplingPeriodNs) 1042{ 1043 return mService->setEventRate(this, handle, samplingPeriodNs); 1044} 1045 1046status_t SensorService::SensorEventConnection::flush() { 1047 SensorDevice& dev(SensorDevice::getInstance()); 1048 const int halVersion = dev.getHalDeviceVersion(); 1049 Mutex::Autolock _l(mConnectionLock); 1050 status_t err(NO_ERROR); 1051 // Loop through all sensors for this connection and call flush on each of them. 1052 for (size_t i = 0; i < mSensorInfo.size(); ++i) { 1053 const int handle = mSensorInfo.keyAt(i); 1054 if (halVersion < SENSORS_DEVICE_API_VERSION_1_1 || mService->isVirtualSensor(handle)) { 1055 // For older devices just increment pending flush count which will send a trivial 1056 // flush complete event. 1057 FlushInfo& flushInfo = mSensorInfo.editValueFor(handle); 1058 flushInfo.mPendingFlushEventsToSend++; 1059 } else { 1060 status_t err_flush = mService->flushSensor(this, handle); 1061 if (err_flush != NO_ERROR) { 1062 ALOGE("Flush error handle=%d %s", handle, strerror(-err_flush)); 1063 } 1064 err = (err_flush != NO_ERROR) ? err_flush : err; 1065 } 1066 } 1067 return err; 1068} 1069 1070void SensorService::SensorEventConnection::decreaseWakeLockRefCount() { 1071 { 1072 Mutex::Autolock _l(mConnectionLock); 1073 --mWakeLockRefCount; 1074 } 1075 // Release the lock before calling checkWakeLockState which also needs the same connectionLock. 1076 if (mWakeLockRefCount == 0) { 1077 mService->checkWakeLockState(); 1078 } 1079} 1080 1081// --------------------------------------------------------------------------- 1082}; // namespace android 1083 1084