зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
3.3 KiB
C++
132 строки
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et ft=cpp : */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Hal.h"
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#include <cutils/properties.h>
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#include <stdio.h>
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#include <string.h>
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#include "HalLog.h"
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#include "nsITimer.h"
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#include "mozilla/unused.h"
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namespace mozilla {
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namespace hal_impl {
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static const int sRetryInterval = 100; // ms
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bool
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SystemServiceIsRunning(const char* aSvcName)
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{
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MOZ_ASSERT(NS_IsMainThread());
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char key[PROPERTY_KEY_MAX];
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auto res = snprintf(key, sizeof(key), "init.svc.%s", aSvcName);
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if (res < 0) {
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HAL_ERR("snprintf: %s", strerror(errno));
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return false;
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} else if (static_cast<size_t>(res) >= sizeof(key)) {
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HAL_ERR("snprintf: trunctated service name %s", aSvcName);
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return false;
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}
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char value[PROPERTY_VALUE_MAX];
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NS_WARN_IF(property_get(key, value, "") < 0);
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return !strcmp(value, "running");
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}
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class StartSystemServiceTimerCallback final : public nsITimerCallback
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{
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NS_DECL_THREADSAFE_ISUPPORTS;
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public:
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StartSystemServiceTimerCallback(const char* aSvcName, const char* aArgs)
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: mSvcName(aSvcName)
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, mArgs(aArgs)
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{
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MOZ_COUNT_CTOR_INHERITED(StartSystemServiceTimerCallback,
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nsITimerCallback);
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}
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NS_IMETHOD Notify(nsITimer* aTimer) override
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{
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MOZ_ASSERT(NS_IsMainThread());
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return StartSystemService(mSvcName.get(), mArgs.get());
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}
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protected:
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~StartSystemServiceTimerCallback()
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{
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MOZ_COUNT_DTOR_INHERITED(StartSystemServiceTimerCallback,
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nsITimerCallback);
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}
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private:
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nsCString mSvcName;
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nsCString mArgs;
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};
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NS_IMPL_ISUPPORTS0(StartSystemServiceTimerCallback);
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nsresult
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StartSystemService(const char* aSvcName, const char* aArgs)
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{
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MOZ_ASSERT(NS_IsMainThread());
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char value[PROPERTY_VALUE_MAX];
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auto res = snprintf(value, sizeof(value), "%s:%s", aSvcName, aArgs);
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if (res < 0) {
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HAL_ERR("snprintf: %s", strerror(errno));
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return NS_ERROR_FAILURE;
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} else if (static_cast<size_t>(res) >= sizeof(value)) {
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HAL_ERR("snprintf: trunctated service name %s", aSvcName);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (NS_WARN_IF(property_set("ctl.start", value) < 0)) {
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return NS_ERROR_FAILURE;
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}
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/* If the system service is not running, re-try later to start it.
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*
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* This condition happens when we restart a service immediately
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* after it crashed, as the service state remains 'stopping'
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* instead of 'stopped'. Due to the limitation of property service,
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* hereby add delay. See Bug 1143925 Comment 41.
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*/
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if (!SystemServiceIsRunning(aSvcName)) {
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nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1");
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if (!timer) {
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return NS_ERROR_FAILURE;
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}
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RefPtr<StartSystemServiceTimerCallback> timerCallback =
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new StartSystemServiceTimerCallback(aSvcName, aArgs);
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timer->InitWithCallback(timerCallback,
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sRetryInterval,
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nsITimer::TYPE_ONE_SHOT);
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}
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return NS_OK;
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}
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void
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StopSystemService(const char* aSvcName)
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{
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MOZ_ASSERT(NS_IsMainThread());
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Unused << NS_WARN_IF(property_set("ctl.stop", aSvcName));
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}
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} // namespace hal_impl
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} // namespace mozilla
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