1 /*
2  * Copyright (C) 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <signal.h>
20 
21 #include <vector>
22 
23 namespace cuttlefish {
24 
25 /**
26  * Blocks signals for the current thread for the lifetime of the object.
27  *
28  * Provides a RAII interface to sigprocmask.
29  */
30 class SignalMasker {
31  public:
32   /**
33    * Blocks the given signals until the object is destroyed.
34    */
35   SignalMasker(sigset_t signals);
36   SignalMasker(const SignalMasker&) = delete;
37   SignalMasker(SignalMasker&&) = delete;
38   SignalMasker operator=(const SignalMasker&) = delete;
39   SignalMasker operator=(SignalMasker&&) = delete;
40   ~SignalMasker();
41 
42  private:
43   sigset_t old_mask_;
44 };
45 
46 void ChangeSignalHandlers(void(*handler)(int), std::vector<int> signals);
47 
48 }  // namespace cuttlefish
49