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- // Copyright 2013 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 "services/device/geolocation/wifi_data_provider.h"
- #include "base/bind.h"
- #include "base/callback.h"
- #include "base/location.h"
- #include "base/threading/thread_task_runner_handle.h"
- namespace device {
- WifiDataProvider::WifiDataProvider()
- : client_task_runner_(base::ThreadTaskRunnerHandle::Get()) {
- DCHECK(client_task_runner_);
- }
- WifiDataProvider::~WifiDataProvider() = default;
- void WifiDataProvider::AddCallback(WifiDataUpdateCallback* callback) {
- callbacks_.insert(callback);
- }
- bool WifiDataProvider::RemoveCallback(WifiDataUpdateCallback* callback) {
- return callbacks_.erase(callback) == 1;
- }
- bool WifiDataProvider::has_callbacks() const {
- return !callbacks_.empty();
- }
- void WifiDataProvider::RunCallbacks() {
- client_task_runner_->PostTask(
- FROM_HERE, base::BindOnce(&WifiDataProvider::DoRunCallbacks, this));
- }
- bool WifiDataProvider::CalledOnClientThread() const {
- return client_task_runner()->BelongsToCurrentThread();
- }
- void WifiDataProvider::DoRunCallbacks() {
- // It's possible that all the callbacks went away whilst this task was
- // pending. This is fine; the loop will be a no-op.
- CallbackSet::const_iterator iter = callbacks_.begin();
- while (iter != callbacks_.end()) {
- WifiDataUpdateCallback* callback = *iter;
- ++iter; // Advance iter before running, in case callback unregisters.
- callback->Run();
- }
- }
- } // namespace device
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