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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "SensorDevice.h"
#include "SensorDirectConnection.h"
#include <hardware/sensors.h>
#define UNUSED(x) (void)(x)
namespace android {
SensorService::SensorDirectConnection::SensorDirectConnection(const sp<SensorService>& service,
uid_t uid, const sensors_direct_mem_t *mem, int32_t halChannelHandle,
const String16& opPackageName)
: mService(service), mUid(uid), mMem(*mem),
mHalChannelHandle(halChannelHandle),
mOpPackageName(opPackageName), mDestroyed(false) {
ALOGD_IF(DEBUG_CONNECTIONS, "Created SensorDirectConnection");
}
SensorService::SensorDirectConnection::~SensorDirectConnection() {
ALOGD_IF(DEBUG_CONNECTIONS, "~SensorDirectConnection %p", this);
destroy();
}
void SensorService::SensorDirectConnection::destroy() {
Mutex::Autolock _l(mDestroyLock);
// destroy once only
if (mDestroyed) {
return;
}
stopAll();
mService->cleanupConnection(this);
if (mMem.handle != nullptr) {
native_handle_close(mMem.handle);
native_handle_delete(const_cast<struct native_handle*>(mMem.handle));
}
mDestroyed = true;
}
void SensorService::SensorDirectConnection::onFirstRef() {
}
void SensorService::SensorDirectConnection::dump(String8& result) const {
Mutex::Autolock _l(mConnectionLock);
result.appendFormat("\tPackage %s, HAL channel handle %d, total sensor activated %zu\n",
String8(mOpPackageName).string(), getHalChannelHandle(), mActivated.size());
for (auto &i : mActivated) {
result.appendFormat("\t\tSensor %#08x, rate %d\n", i.first, i.second);
}
}
sp<BitTube> SensorService::SensorDirectConnection::getSensorChannel() const {
return nullptr;
}
status_t SensorService::SensorDirectConnection::enableDisable(
int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs,
int reservedFlags) {
// SensorDirectConnection does not support enableDisable, parameters not used
UNUSED(handle);
UNUSED(enabled);
UNUSED(samplingPeriodNs);
UNUSED(maxBatchReportLatencyNs);
UNUSED(reservedFlags);
return INVALID_OPERATION;
}
status_t SensorService::SensorDirectConnection::setEventRate(
int handle, nsecs_t samplingPeriodNs) {
// SensorDirectConnection does not support setEventRate, parameters not used
UNUSED(handle);
UNUSED(samplingPeriodNs);
return INVALID_OPERATION;
}
status_t SensorService::SensorDirectConnection::flush() {
// SensorDirectConnection does not support flush
return INVALID_OPERATION;
}
int32_t SensorService::SensorDirectConnection::configureChannel(int handle, int rateLevel) {
if (handle == -1 && rateLevel == SENSOR_DIRECT_RATE_STOP) {
stopAll();
return NO_ERROR;
}
if (mService->isOperationRestricted(mOpPackageName)) {
return PERMISSION_DENIED;
}
sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
if (si == nullptr) {
return NAME_NOT_FOUND;
}
const Sensor& s = si->getSensor();
if (!SensorService::canAccessSensor(s, "config direct channel", mOpPackageName)) {
return PERMISSION_DENIED;
}
if (s.getHighestDirectReportRateLevel() == 0
|| rateLevel > s.getHighestDirectReportRateLevel()
|| !s.isDirectChannelTypeSupported(mMem.type)) {
return INVALID_OPERATION;
}
struct sensors_direct_cfg_t config = {
.rate_level = rateLevel
};
Mutex::Autolock _l(mConnectionLock);
SensorDevice& dev(SensorDevice::getInstance());
int ret = dev.configureDirectChannel(handle, getHalChannelHandle(), &config);
if (rateLevel == SENSOR_DIRECT_RATE_STOP) {
if (ret == NO_ERROR) {
mActivated.erase(handle);
} else if (ret > 0) {
ret = UNKNOWN_ERROR;
}
} else {
if (ret > 0) {
mActivated[handle] = rateLevel;
}
}
return ret;
}
void SensorService::SensorDirectConnection::stopAll(bool backupRecord) {
struct sensors_direct_cfg_t config = {
.rate_level = SENSOR_DIRECT_RATE_STOP
};
Mutex::Autolock _l(mConnectionLock);
SensorDevice& dev(SensorDevice::getInstance());
for (auto &i : mActivated) {
dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
}
if (backupRecord && mActivatedBackup.empty()) {
mActivatedBackup = mActivated;
}
mActivated.clear();
}
void SensorService::SensorDirectConnection::recoverAll() {
stopAll(false);
Mutex::Autolock _l(mConnectionLock);
SensorDevice& dev(SensorDevice::getInstance());
// recover list of report from backup
mActivated = mActivatedBackup;
mActivatedBackup.clear();
// re-enable them
for (auto &i : mActivated) {
struct sensors_direct_cfg_t config = {
.rate_level = i.second
};
dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
}
}
int32_t SensorService::SensorDirectConnection::getHalChannelHandle() const {
return mHalChannelHandle;
}
bool SensorService::SensorDirectConnection::isEquivalent(const sensors_direct_mem_t *mem) const {
bool ret = false;
if (mMem.type == mem->type) {
switch (mMem.type) {
case SENSOR_DIRECT_MEM_TYPE_ASHMEM: {
// there is no known method to test if two ashmem fds are equivalent besides
// trivially comparing the fd values (ino number from fstat() are always the
// same, pointing to "/dev/ashmem").
int fd1 = mMem.handle->data[0];
int fd2 = mem->handle->data[0];
ret = (fd1 == fd2);
break;
}
case SENSOR_DIRECT_MEM_TYPE_GRALLOC:
// there is no known method to test if two gralloc handle are equivalent
ret = false;
break;
default:
// should never happen
ALOGE("Unexpected mem type %d", mMem.type);
ret = true;
break;
}
}
return ret;
}
} // namespace android
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