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 7namespace content { 8 9WifiDataProvider::WifiDataProvider() 10 : client_loop_(base::MessageLoop::current()) { 11 DCHECK(client_loop_); 12} 13 14WifiDataProvider::~WifiDataProvider() { 15} 16 17void WifiDataProvider::AddCallback(WifiDataUpdateCallback* callback) { 18 callbacks_.insert(callback); 19} 20 21bool WifiDataProvider::RemoveCallback(WifiDataUpdateCallback* callback) { 22 return callbacks_.erase(callback) == 1; 23} 24 25bool WifiDataProvider::has_callbacks() const { 26 return !callbacks_.empty(); 27} 28 29void WifiDataProvider::RunCallbacks() { 30 client_loop_->PostTask(FROM_HERE, 31 base::Bind(&WifiDataProvider::DoRunCallbacks, this)); 32} 33 34bool WifiDataProvider::CalledOnClientThread() const { 35 return base::MessageLoop::current() == this->client_loop_; 36} 37 38base::MessageLoop* WifiDataProvider::client_loop() const { 39 return client_loop_; 40} 41 42void 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