64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
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/*
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* Copyright (C) 2020 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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#define LOG_TAG "Watchdog"
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#include <watchdog/Watchdog.h>
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#include <android-base/logging.h>
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#include <android-base/threads.h>
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#include <signal.h>
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#include <time.h>
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#include <cstring>
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#include <utils/Log.h>
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namespace android {
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Watchdog::Watchdog(::std::chrono::steady_clock::duration timeout) {
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// Create the timer.
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struct sigevent sev;
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sev.sigev_notify = SIGEV_THREAD_ID;
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sev.sigev_notify_thread_id = base::GetThreadId();
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sev.sigev_signo = SIGABRT;
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sev.sigev_value.sival_ptr = &mTimerId;
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int err = timer_create(CLOCK_MONOTONIC, &sev, &mTimerId);
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if (err != 0) {
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PLOG(FATAL) << "Failed to create timer";
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}
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// Start the timer.
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struct itimerspec spec;
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memset(&spec, 0, sizeof(spec));
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auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(timeout);
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LOG_ALWAYS_FATAL_IF(timeout.count() <= 0, "Duration must be positive");
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spec.it_value.tv_sec = ns.count() / 1000000000;
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spec.it_value.tv_nsec = ns.count() % 1000000000;
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err = timer_settime(mTimerId, 0, &spec, nullptr);
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if (err != 0) {
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PLOG(FATAL) << "Failed to start timer";
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}
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}
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Watchdog::~Watchdog() {
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// Delete the timer.
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int err = timer_delete(mTimerId);
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if (err != 0) {
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PLOG(FATAL) << "Failed to delete timer";
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}
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}
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} // namespace android
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