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57 lines
1.6 KiB
57 lines
1.6 KiB
/* |
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* Copyright (C) 2016 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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#ifndef LIBMEMUNREACHABLE_SCOPED_ALARM_H_ |
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#define LIBMEMUNREACHABLE_SCOPED_ALARM_H_ |
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#include <signal.h> |
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#include <sys/time.h> |
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#include <chrono> |
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#include <functional> |
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namespace android { |
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class ScopedAlarm { |
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public: |
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ScopedAlarm(std::chrono::microseconds us, std::function<void()> func) { |
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func_ = func; |
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struct sigaction oldact {}; |
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struct sigaction act {}; |
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act.sa_handler = [](int) { ScopedAlarm::func_(); }; |
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sigaction(SIGALRM, &act, &oldact); |
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std::chrono::seconds s = std::chrono::duration_cast<std::chrono::seconds>(us); |
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itimerval t = itimerval{}; |
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t.it_value.tv_sec = s.count(); |
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t.it_value.tv_usec = (us - s).count(); |
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setitimer(ITIMER_REAL, &t, NULL); |
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} |
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~ScopedAlarm() { |
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itimerval t = itimerval{}; |
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setitimer(ITIMER_REAL, &t, NULL); |
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struct sigaction act {}; |
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act.sa_handler = SIG_DFL; |
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sigaction(SIGALRM, &act, NULL); |
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} |
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private: |
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static std::function<void()> func_; |
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}; |
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} // namespace android |
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#endif
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