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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "content/browser/device_orientation/device_motion_service.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/logging.h" |
| 9 #include "base/memory/singleton.h" |
| 10 #include "content/browser/device_orientation/device_motion_provider.h" |
| 11 #include "content/public/browser/render_process_host.h" |
| 12 |
| 13 namespace content { |
| 14 |
| 15 DeviceMotionService::DeviceMotionService() : num_readers_(0) { |
| 16 } |
| 17 |
| 18 DeviceMotionService::~DeviceMotionService() { |
| 19 } |
| 20 |
| 21 DeviceMotionService* DeviceMotionService::GetInstance() { |
| 22 return Singleton<DeviceMotionService, |
| 23 LeakySingletonTraits<DeviceMotionService> >::get(); |
| 24 } |
| 25 |
| 26 void DeviceMotionService::AddConsumer() { |
| 27 DCHECK(thread_checker_.CalledOnValidThread()); |
| 28 |
| 29 num_readers_++; |
| 30 DCHECK(num_readers_ > 0); |
| 31 if (!provider_.get()) |
| 32 provider_.reset(new DeviceMotionProvider); |
| 33 provider_->StartFetchingDeviceMotionData(); |
| 34 } |
| 35 |
| 36 void DeviceMotionService::RemoveConsumer() { |
| 37 DCHECK(thread_checker_.CalledOnValidThread()); |
| 38 |
| 39 --num_readers_; |
| 40 DCHECK(num_readers_ >= 0); |
| 41 |
| 42 if (num_readers_ == 0) { |
| 43 LOG(INFO) << "ACTIVE service stop fetching"; |
| 44 provider_->StopFetchingDeviceMotionData(); |
| 45 } |
| 46 } |
| 47 |
| 48 void DeviceMotionService::Terminate() { |
| 49 provider_.reset(); |
| 50 } |
| 51 |
| 52 base::SharedMemoryHandle DeviceMotionService::GetSharedMemoryHandleForProcess( |
| 53 base::ProcessHandle handle) { |
| 54 DCHECK(thread_checker_.CalledOnValidThread()); |
| 55 return provider_->GetSharedMemoryHandleForProcess(handle); |
| 56 } |
| 57 |
| 58 } // namespace content |
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