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| 1 // Copyright 2014 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 "device/geolocation/wifi_data_provider_manager.h" | |
| 6 | |
| 7 #include "device/geolocation/wifi_data_provider.h" | |
| 8 | |
| 9 namespace device { | |
| 10 | |
| 11 // static | |
| 12 WifiDataProviderManager* WifiDataProviderManager::instance_ = NULL; | |
| 13 | |
| 14 // static | |
| 15 WifiDataProviderManager::ImplFactoryFunction | |
| 16 WifiDataProviderManager::factory_function_ = DefaultFactoryFunction; | |
| 17 | |
| 18 // static | |
| 19 void WifiDataProviderManager::SetFactoryForTesting( | |
| 20 ImplFactoryFunction factory_function_in) { | |
| 21 factory_function_ = factory_function_in; | |
| 22 } | |
| 23 | |
| 24 // static | |
| 25 void WifiDataProviderManager::ResetFactoryForTesting() { | |
| 26 factory_function_ = DefaultFactoryFunction; | |
| 27 } | |
| 28 | |
| 29 // static | |
| 30 WifiDataProviderManager* WifiDataProviderManager::Register( | |
| 31 WifiDataUpdateCallback* callback) { | |
| 32 bool need_to_start_data_provider = false; | |
| 33 if (!instance_) { | |
| 34 instance_ = new WifiDataProviderManager(); | |
| 35 need_to_start_data_provider = true; | |
| 36 } | |
| 37 DCHECK(instance_); | |
| 38 instance_->AddCallback(callback); | |
| 39 // Start the provider after adding the callback, to avoid any race in | |
| 40 // it running early. | |
| 41 if (need_to_start_data_provider) | |
| 42 instance_->StartDataProvider(); | |
| 43 return instance_; | |
| 44 } | |
| 45 | |
| 46 // static | |
| 47 bool WifiDataProviderManager::Unregister(WifiDataUpdateCallback* callback) { | |
| 48 DCHECK(instance_); | |
| 49 DCHECK(instance_->has_callbacks()); | |
| 50 if (!instance_->RemoveCallback(callback)) { | |
| 51 return false; | |
| 52 } | |
| 53 if (!instance_->has_callbacks()) { | |
| 54 // Must stop the data provider (and any implementation threads) before | |
| 55 // destroying to avoid any race conditions in access to the provider in | |
| 56 // the destructor chain. | |
| 57 instance_->StopDataProvider(); | |
| 58 delete instance_; | |
| 59 instance_ = NULL; | |
| 60 } | |
| 61 return true; | |
| 62 } | |
| 63 | |
| 64 WifiDataProviderManager::WifiDataProviderManager() { | |
| 65 DCHECK(factory_function_); | |
| 66 impl_ = (*factory_function_)(); | |
| 67 DCHECK(impl_.get()); | |
| 68 } | |
| 69 | |
| 70 WifiDataProviderManager::~WifiDataProviderManager() { | |
| 71 DCHECK(impl_.get()); | |
| 72 } | |
| 73 | |
| 74 bool WifiDataProviderManager::GetData(WifiData* data) { | |
| 75 return impl_->GetData(data); | |
| 76 } | |
| 77 | |
| 78 void WifiDataProviderManager::AddCallback(WifiDataUpdateCallback* callback) { | |
| 79 impl_->AddCallback(callback); | |
| 80 } | |
| 81 | |
| 82 bool WifiDataProviderManager::RemoveCallback(WifiDataUpdateCallback* callback) { | |
| 83 return impl_->RemoveCallback(callback); | |
| 84 } | |
| 85 | |
| 86 bool WifiDataProviderManager::has_callbacks() const { | |
| 87 return impl_->has_callbacks(); | |
| 88 } | |
| 89 | |
| 90 void WifiDataProviderManager::StartDataProvider() { | |
| 91 impl_->StartDataProvider(); | |
| 92 } | |
| 93 | |
| 94 void WifiDataProviderManager::StopDataProvider() { | |
| 95 impl_->StopDataProvider(); | |
| 96 } | |
| 97 | |
| 98 } // namespace device | |
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Chromium Code Reviews
Issue 2179903007:
Delete remaining leftover files in //device/geolocation (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master