xref: /aosp_15_r20/external/cronet/base/callback_list.cc (revision 6777b5387eb2ff775bb5750e3f5d96f37fb7352b) 
1 // Copyright 2020 The Chromium Authors
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 "base/callback_list.h"
6 
7 #include <utility>
8 
9 #include "base/functional/callback.h"
10 
11 namespace base {
12 
13 CallbackListSubscription::CallbackListSubscription() = default;
14 
CallbackListSubscription(base::OnceClosure closure)15 CallbackListSubscription::CallbackListSubscription(base::OnceClosure closure)
16     : closure_(std::move(closure)) {}
17 
CallbackListSubscription(CallbackListSubscription && subscription)18 CallbackListSubscription::CallbackListSubscription(
19     CallbackListSubscription&& subscription)
20     : closure_(std::move(subscription.closure_)) {}
21 
operator =(CallbackListSubscription && subscription)22 CallbackListSubscription& CallbackListSubscription::operator=(
23     CallbackListSubscription&& subscription) {
24   // Note: This still works properly for self-assignment.
25   Run();
26   closure_ = std::move(subscription.closure_);
27   return *this;
28 }
29 
~CallbackListSubscription()30 CallbackListSubscription::~CallbackListSubscription() {
31   Run();
32 }
33 
Run()34 void CallbackListSubscription::Run() {
35   if (closure_)
36     std::move(closure_).Run();
37 }
38 
39 }  // namespace base
40