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58 lines
1.6 KiB
58 lines
1.6 KiB
/*
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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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#include "watchdog.h"
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#include <chrono>
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#include <functional>
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#include <systemd/sd-daemon.h>
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namespace android::automotive::agl::utils {
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SystemdWatchdog::SystemdWatchdog() : mThread(std::bind(&SystemdWatchdog::WatchdogThread, this)) {}
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void SystemdWatchdog::WatchdogThread() {
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uint64_t usec = 0;
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int r = sd_watchdog_enabled(0, &usec);
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if (r < 0) {
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fprintf(stderr, "watchdog error: %d\n", r);
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return;
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}
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// function returned, but watchdog not applicable
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if (r == 0) return;
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if (usec == 0) {
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fprintf(stderr, "watchdog interval of 0 does not make sense!\n");
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return;
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}
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usec = (2 * usec) / 3; // give us breathing room here
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if (usec == 0) usec = 1;
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sd_notify(0, "READY=1");
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std::chrono::duration<uint64_t, std::micro> mInterval{usec};
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while (true) {
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std::this_thread::sleep_for(mInterval);
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if (IsHealthy())
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sd_notify(0, "WATCHDOG=1");
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else
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sd_notify(0, "WATCHDOG=trigger");
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}
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}
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} // namespace android::automotive::agl::utils
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