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https://gitlab.winehq.org/wine/wine-gecko.git
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cef48585f2
The new HAL interface allows for starting, stopping, and querying the status of system services. How these operations are performed depends on the underlying system. The current implementation for Gonk already contains a workaround from Bluetooth, where quickly restarted system services require a cool-down time between retrys.
132 lines
3.3 KiB
C++
132 lines
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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