Index: device/sensors/sensor_provider_impl.cc |
diff --git a/device/sensors/sensor_provider_impl.cc b/device/sensors/sensor_provider_impl.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d525f6b196b8c66d8a2cda619cebe00a1eda8996 |
--- /dev/null |
+++ b/device/sensors/sensor_provider_impl.cc |
@@ -0,0 +1,82 @@ |
+// 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/sensors/sensor_provider_impl.h" |
+ |
+#include <utility> |
+ |
+#include "device/sensors/platform_sensor_provider.h" |
+#include "device/sensors/sensor_impl.h" |
+ |
+namespace device { |
+namespace mojom { |
+ |
+namespace { |
+const uint64_t kSharedBufferSizeInBytes = |
+ SensorReadBuffer::kReadBufferSize * static_cast<uint64_t>(SensorType::LAST); |
+} |
+ |
+PlatformSensorProvider* SensorProviderImpl::s_provider_ = nullptr; |
+ |
+// static |
+void SensorProviderImpl::Create( |
+ mojo::InterfaceRequest<SensorProvider> request) { |
+ if (!s_provider_) |
+ s_provider_ = PlatformSensorProvider::Create(kSharedBufferSizeInBytes); |
+ |
+ if (s_provider_) { |
+ new SensorProviderImpl(std::move(request)); |
+ } |
+} |
+ |
+SensorProviderImpl::SensorProviderImpl( |
+ mojo::InterfaceRequest<SensorProvider> request) |
+ : binding_(this, std::move(request)) {} |
+ |
+SensorProviderImpl::~SensorProviderImpl() {} |
+ |
+namespace { |
+ |
+void ReportError(const SensorProvider::GetSensorCallback& callback) { |
+ callback.Run(nullptr, nullptr); |
+} |
+ |
+uint64_t GetBufferOffset(device::SensorType type) { |
+ return (static_cast<uint64_t>(SensorType::LAST) - |
+ static_cast<uint64_t>(type)) * |
+ SensorReadBuffer::kReadBufferSize; |
+} |
+ |
+} // namespace |
+ |
+void SensorProviderImpl::GetSensor(device::SensorType type, |
+ SensorRequest sensor_request, |
+ const GetSensorCallback& callback) { |
+ auto cloned_handle = s_provider_->GetClonedSharedBufferHandle(); |
+ if (!cloned_handle.is_valid()) { |
+ ReportError(callback); |
+ return; |
+ } |
+ |
+ auto sensor = s_provider_->GetSensor(type); |
+ if (!sensor) |
+ sensor = s_provider_->CreateSensor(type, SensorReadBuffer::kReadBufferSize, |
+ GetBufferOffset(type)); |
+ if (!sensor) { |
+ ReportError(callback); |
+ return; |
+ } |
+ |
+ SensorImpl* sensor_impl = new SensorImpl(std::move(sensor_request), sensor); |
+ |
+ SensorReadBufferPtr sensor_read_buffer = SensorReadBuffer::New(); |
+ sensor_read_buffer->memory = std::move(cloned_handle); |
+ sensor_read_buffer->offset = GetBufferOffset(type); |
+ sensor_read_buffer->mode = sensor->GetReportingMode(); |
+ |
+ callback.Run(std::move(sensor_read_buffer), sensor_impl->GetClient()); |
+} |
+ |
+} // namespace mojom |
+} // namespace device |