Index: content/browser/geolocation/wifi_data_provider.cc |
diff --git a/content/browser/geolocation/wifi_data_provider.cc b/content/browser/geolocation/wifi_data_provider.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..aa4fb7fb04696079bd042ba4437161fc8d0a3253 |
--- /dev/null |
+++ b/content/browser/geolocation/wifi_data_provider.cc |
@@ -0,0 +1,54 @@ |
+// 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 "content/browser/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 content { |
+ |
+WifiDataProvider::WifiDataProvider() |
+ : client_task_runner_(base::ThreadTaskRunnerHandle::Get()) { |
+ DCHECK(client_task_runner_); |
+} |
+ |
+WifiDataProvider::~WifiDataProvider() { |
+} |
+ |
+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::Bind(&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 content |