support _POSIX_REALTIME_SIGNALS
[android-sdk/platform-bionic.git] / tests / ScopedSignalHandler.h
1 /*
2  * Copyright (C) 2012 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  */
17 #ifndef _BIONIC_TESTS_SCOPED_SIGNAL_HANDLER_H
18 #define _BIONIC_TESTS_SCOPED_SIGNAL_HANDLER_H
20 #include <signal.h>
21 #include <string.h>
23 class ScopedSignalHandler {
24  public:
25   ScopedSignalHandler(int signal_number, void (*handler)(int), int sa_flags = 0)
26       : signal_number_(signal_number) {
27     memset(&action_, 0, sizeof(action_));
28     action_.sa_flags = sa_flags;
29     action_.sa_handler = handler;
30     sigaction(signal_number_, &action_, &old_action_);
31   }
33   ScopedSignalHandler(int signal_number, void (*action)(int, siginfo_t*, void*),
34                       int sa_flags = SA_SIGINFO)
35       : signal_number_(signal_number) {
36     memset(&action_, 0, sizeof(action_));
37     action_.sa_flags = sa_flags;
38     action_.sa_sigaction = action;
39     sigaction(signal_number_, &action_, &old_action_);
40   }
42   ~ScopedSignalHandler() {
43     sigaction(signal_number_, &old_action_, NULL);
44   }
46  private:
47   struct sigaction action_;
48   struct sigaction old_action_;
49   const int signal_number_;
50 };
52 #endif // _BIONIC_TESTS_SCOPED_SIGNAL_HANDLER_H