Add a CallbackRegistry class to base/ to manage callbacks

base/callback_list.cc

Index: base/callback_list.cc
diff --git a/base/callback_list.cc b/base/callback_list.cc
new file mode 100644
index 0000000000000000000000000000000000000000..283b6cf0b96d2d6a63c5e1bcf9fe2b01e53cbc3c
--- /dev/null
+++ b/base/callback_list.cc
@@ -0,0 +1,33 @@
+#include "base/callback_list.h"

[awong, 2013/09/04 18:48:21]

Missing copyright.

[Cait (Slow), 2013/09/04 22:09:25]

Done.

+
+namespace base {
+
+CallbackList::CallbackList(CallbackNotificationType type)
+      : list_impl_(new base::internal::CallbackListImpl(type)) {}
+
+CallbackList::~CallbackList() {}
+
+base::Closure CallbackList::Add(const base::Closure& cb) {
+  DCHECK(!cb.is_null());
+  return list_impl_->AddCallback(new base::Closure(cb));
+}
+
+void CallbackList::Run() {
+  if (might_have_callbacks()) {
+    internal::CallbackListImpl::Iterator it(list_impl_->GetWeakPtr());
+    base::Closure* cb;
+    while((cb = static_cast<base::Closure*>(it.GetNext())) != NULL) {
+      cb->Run();
+    }
+  }
+}
+
+void CallbackList::Clear() {
+  list_impl_->Clear();
+}
+
+bool CallbackList::might_have_callbacks() {
+  return list_impl_->might_have_callbacks();
+}
+
+} // namespace base

[awong, 2013/09/04 18:48:21]

}  // namespace base

[Cait (Slow), 2013/09/04 22:09:25]

Done.