1 // Copyright 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/geolocation/wifi_data_provider.h" 6 7 namespace content { 8 9 WifiDataProvider::WifiDataProvider() 10 : client_loop_(base::MessageLoop::current()) { 11 DCHECK(client_loop_); 12 } 13 14 WifiDataProvider::~WifiDataProvider() { 15 } 16 17 void WifiDataProvider::AddCallback(WifiDataUpdateCallback* callback) { 18 callbacks_.insert(callback); 19 } 20 21 bool WifiDataProvider::RemoveCallback(WifiDataUpdateCallback* callback) { 22 return callbacks_.erase(callback) == 1; 23 } 24 25 bool WifiDataProvider::has_callbacks() const { 26 return !callbacks_.empty(); 27 } 28 29 void WifiDataProvider::RunCallbacks() { 30 client_loop_->PostTask(FROM_HERE, 31 base::Bind(&WifiDataProvider::DoRunCallbacks, this)); 32 } 33 34 bool WifiDataProvider::CalledOnClientThread() const { 35 return base::MessageLoop::current() == this->client_loop_; 36 } 37 38 base::MessageLoop* WifiDataProvider::client_loop() const { 39 return client_loop_; 40 } 41 42 void WifiDataProvider::DoRunCallbacks() { 43 // It's possible that all the callbacks went away whilst this task was 44 // pending. This is fine; the loop will be a no-op. 45 CallbackSet::const_iterator iter = callbacks_.begin(); 46 while (iter != callbacks_.end()) { 47 WifiDataUpdateCallback* callback = *iter; 48 ++iter; // Advance iter before running, in case callback unregisters. 49 callback->Run(); 50 } 51 } 52 53 } // namespace content 54
