137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Hal.h"
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#include "HalLog.h"
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#include <unistd.h>
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#include <sys/reboot.h>
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#include "nsIObserverService.h"
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#include "mozilla/Services.h"
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#include "MainThreadUtils.h"
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namespace mozilla {
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namespace hal_impl {
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void
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Reboot()
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{
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if (NS_IsMainThread()) {
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nsCOMPtr<nsIObserverService> obsServ = services::GetObserverService();
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if (obsServ) {
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obsServ->NotifyObservers(nullptr, "system-reboot", nullptr);
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}
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}
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sync();
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reboot(RB_AUTOBOOT);
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}
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void
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PowerOff()
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{
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if (NS_IsMainThread()) {
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nsCOMPtr<nsIObserverService> obsServ = services::GetObserverService();
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if (obsServ) {
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obsServ->NotifyObservers(nullptr, "system-power-off", nullptr);
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}
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}
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sync();
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reboot(RB_POWER_OFF);
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}
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// Structure to specify how watchdog pthread is going to work.
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typedef struct watchdogParam
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{
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hal::ShutdownMode mode; // Specify how to shutdown the system.
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int32_t timeoutSecs; // Specify the delayed seconds to shutdown the system.
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watchdogParam(hal::ShutdownMode aMode, int32_t aTimeoutSecs)
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: mode(aMode), timeoutSecs(aTimeoutSecs) {}
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} watchdogParam_t;
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// Function to complusively shut down the system with a given mode.
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static void
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QuitHard(hal::ShutdownMode aMode)
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{
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switch (aMode)
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{
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case hal::eHalShutdownMode_PowerOff:
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PowerOff();
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break;
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case hal::eHalShutdownMode_Reboot:
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Reboot();
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break;
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case hal::eHalShutdownMode_Restart:
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// Don't let signal handlers affect forced shutdown.
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kill(0, SIGKILL);
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// If we can't SIGKILL our process group, something is badly
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// wrong. Trying to deliver a catch-able signal to ourselves can
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// invoke signal handlers and might cause problems. So try
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// _exit() and hope we go away.
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_exit(1);
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break;
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default:
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MOZ_CRASH();
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}
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}
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// Function to complusively shut down the system with a given mode when timeout.
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static void*
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ForceQuitWatchdog(void* aParamPtr)
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{
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watchdogParam_t* paramPtr = reinterpret_cast<watchdogParam_t*>(aParamPtr);
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if (paramPtr->timeoutSecs > 0 && paramPtr->timeoutSecs <= 30) {
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// If we shut down normally before the timeout, this thread will
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// be harmlessly reaped by the OS.
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TimeStamp deadline =
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(TimeStamp::Now() + TimeDuration::FromSeconds(paramPtr->timeoutSecs));
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while (true) {
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TimeDuration remaining = (deadline - TimeStamp::Now());
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int sleepSeconds = int(remaining.ToSeconds());
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if (sleepSeconds <= 0) {
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break;
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}
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sleep(sleepSeconds);
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}
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}
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hal::ShutdownMode mode = paramPtr->mode;
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delete paramPtr;
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QuitHard(mode);
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return nullptr;
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}
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void
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StartForceQuitWatchdog(hal::ShutdownMode aMode, int32_t aTimeoutSecs)
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{
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// Force-quits are intepreted a little more ferociously on Gonk,
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// because while Gecko is in the process of shutting down, the user
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// can't call 911, for example. And if we hang on shutdown, bad
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// things happen. So, make sure that doesn't happen.
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if (aTimeoutSecs <= 0) {
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return;
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}
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// Use a raw pthread here to insulate ourselves from bugs in other
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// Gecko code that we're trying to protect!
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//
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// Note that we let the watchdog in charge of releasing |paramPtr|
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// if the pthread is successfully created.
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watchdogParam_t* paramPtr = new watchdogParam_t(aMode, aTimeoutSecs);
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pthread_t watchdog;
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if (pthread_create(&watchdog, nullptr,
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ForceQuitWatchdog,
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reinterpret_cast<void*>(paramPtr))) {
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// Better safe than sorry.
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delete paramPtr;
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QuitHard(aMode);
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}
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// The watchdog thread is off and running now.
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}
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} // hal_impl
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} // mozilla
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