/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <signal.h>
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class ScopedSignalHandler {
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public:
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ScopedSignalHandler(int signal_number, void (*handler)(int), int sa_flags = 0)
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: signal_number_(signal_number) {
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action_ = { .sa_flags = sa_flags, .sa_handler = handler };
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sigaction64(signal_number_, &action_, &old_action_);
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}
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ScopedSignalHandler(int signal_number, void (*action)(int, siginfo_t*, void*),
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int sa_flags = SA_SIGINFO)
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: signal_number_(signal_number) {
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action_ = { .sa_flags = sa_flags, .sa_sigaction = action };
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sigaction64(signal_number_, &action_, &old_action_);
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}
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explicit ScopedSignalHandler(int signal_number) : signal_number_(signal_number) {
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sigaction64(signal_number, nullptr, &old_action_);
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}
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~ScopedSignalHandler() {
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sigaction64(signal_number_, &old_action_, nullptr);
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}
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struct sigaction64 action_;
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struct sigaction64 old_action_;
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const int signal_number_;
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};
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