Index: device/generic_sensor/platform_sensor_provider_linux.cc |
diff --git a/device/generic_sensor/platform_sensor_provider_linux.cc b/device/generic_sensor/platform_sensor_provider_linux.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ec5226bf5ca69ec5047cb97ce11542c6ec91957f |
--- /dev/null |
+++ b/device/generic_sensor/platform_sensor_provider_linux.cc |
@@ -0,0 +1,102 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "device/generic_sensor/platform_sensor_provider_linux.h" |
+ |
+#include "base/memory/singleton.h" |
+#include "base/task_runner_util.h" |
+#include "base/threading/thread.h" |
+#include "device/generic_sensor/linux/platform_sensor_utils_linux.h" |
+#include "device/generic_sensor/linux/sensor_data_linux.h" |
+#include "device/generic_sensor/platform_sensor_linux.h" |
+ |
+namespace device { |
+ |
+// static |
+PlatformSensorProviderLinux* PlatformSensorProviderLinux::GetInstance() { |
+ return base::Singleton< |
+ PlatformSensorProviderLinux, |
+ base::LeakySingletonTraits<PlatformSensorProviderLinux>>::get(); |
+} |
+ |
+PlatformSensorProviderLinux::PlatformSensorProviderLinux() = default; |
+ |
+PlatformSensorProviderLinux::~PlatformSensorProviderLinux() = default; |
+ |
+void PlatformSensorProviderLinux::CreateSensorInternal( |
+ mojom::SensorType type, |
+ mojo::ScopedSharedBufferMapping mapping, |
+ const CreateSensorCallback& callback) { |
+ SensorDataLinux data; |
+ if (!InitSensorData(type, &data)) { |
+ callback.Run(nullptr); |
+ return; |
+ } |
+ |
+ if (!polling_thread_) |
+ polling_thread_.reset(new base::Thread("Sensor polling thread")); |
+ |
+ if (!polling_thread_->IsRunning()) { |
+ if (!polling_thread_->StartWithOptions( |
+ base::Thread::Options(base::MessageLoop::TYPE_IO, 0))) { |
+ callback.Run(nullptr); |
+ return; |
+ } |
+ polling_thread_task_runner_ = polling_thread_->task_runner(); |
+ } |
+ |
+ base::PostTaskAndReplyWithResult( |
+ polling_thread_task_runner_.get(), FROM_HERE, |
+ base::Bind(SensorReader::Create, data), |
+ base::Bind(&PlatformSensorProviderLinux::SensorReaderFound, |
+ base::Unretained(this), type, base::Passed(&mapping), callback, |
+ data)); |
+} |
+ |
+void PlatformSensorProviderLinux::SensorReaderFound( |
+ mojom::SensorType type, |
+ mojo::ScopedSharedBufferMapping mapping, |
+ const PlatformSensorProviderBase::CreateSensorCallback& callback, |
+ const SensorDataLinux& data, |
+ std::unique_ptr<SensorReader> sensor_reader) { |
+ DCHECK(CalledOnValidThread()); |
+ |
+ if (!sensor_reader) { |
+ // If there are no sensors, stop polling thread. |
+ if (!HasSensors()) |
+ AllSensorsRemoved(); |
+ callback.Run(nullptr); |
+ return; |
+ } |
+ |
+ callback.Run(new PlatformSensorLinux(type, std::move(mapping), this, data, |
+ std::move(sensor_reader), |
+ polling_thread_task_runner_)); |
+} |
+ |
+void PlatformSensorProviderLinux::SetFileTaskRunner( |
+ scoped_refptr<base::SingleThreadTaskRunner> file_task_runner) { |
+ DCHECK(CalledOnValidThread()); |
+ if (!file_task_runner_) |
+ file_task_runner_ = file_task_runner; |
+} |
+ |
+void PlatformSensorProviderLinux::AllSensorsRemoved() { |
+ DCHECK(CalledOnValidThread()); |
+ DCHECK(file_task_runner_); |
+ // When there are no sensors left, the polling thread must be stopped. |
+ // Stop() can only be called on a different thread that allows io. |
+ // Thus, browser's file thread is used for this purpose. |
+ file_task_runner_->PostTask( |
+ FROM_HERE, base::Bind(&PlatformSensorProviderLinux::StopPollingThread, |
+ base::Unretained(this))); |
+} |
+ |
+void PlatformSensorProviderLinux::StopPollingThread() { |
+ DCHECK(file_task_runner_); |
+ DCHECK(file_task_runner_->BelongsToCurrentThread()); |
+ polling_thread_->Stop(); |
+} |
+ |
+} // namespace device |