1 files changed, 131 insertions, 0 deletions
diff --git a/hal/gonk/SystemService.cpp b/hal/gonk/SystemService.cpp
new file mode 100644
index 000000000..2b98f5fdd
--- /dev/null
+++ b/hal/gonk/SystemService.cpp
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et ft=cpp : */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "Hal.h"
+
+#include <cutils/properties.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "HalLog.h"
+#include "nsITimer.h"
+#include "mozilla/Unused.h"
+
+namespace mozilla {
+namespace hal_impl {
+
+static const int sRetryInterval = 100; // ms
+
+bool
+SystemServiceIsRunning(const char* aSvcName)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  char key[PROPERTY_KEY_MAX];
+  auto res = snprintf(key, sizeof(key), "init.svc.%s", aSvcName);
+
+  if (res < 0) {
+    HAL_ERR("snprintf: %s", strerror(errno));
+    return false;
+  } else if (static_cast<size_t>(res) >= sizeof(key)) {
+    HAL_ERR("snprintf: trunctated service name %s", aSvcName);
+    return false;
+  }
+
+  char value[PROPERTY_VALUE_MAX];
+  Unused << NS_WARN_IF(property_get(key, value, "") < 0);
+
+  return !strcmp(value, "running");
+}
+
+class StartSystemServiceTimerCallback final : public nsITimerCallback
+{
+  NS_DECL_THREADSAFE_ISUPPORTS;
+
+public:
+  StartSystemServiceTimerCallback(const char* aSvcName, const char* aArgs)
+    : mSvcName(aSvcName)
+    , mArgs(aArgs)
+  {
+    MOZ_COUNT_CTOR_INHERITED(StartSystemServiceTimerCallback,
+                             nsITimerCallback);
+  }
+
+  NS_IMETHOD Notify(nsITimer* aTimer) override
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+
+    return StartSystemService(mSvcName.get(), mArgs.get());
+  }
+
+protected:
+  ~StartSystemServiceTimerCallback()
+  {
+    MOZ_COUNT_DTOR_INHERITED(StartSystemServiceTimerCallback,
+                             nsITimerCallback);
+  }
+
+private:
+  nsCString mSvcName;
+  nsCString mArgs;
+};
+
+NS_IMPL_ISUPPORTS0(StartSystemServiceTimerCallback);
+
+nsresult
+StartSystemService(const char* aSvcName, const char* aArgs)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  char value[PROPERTY_VALUE_MAX];
+  auto res = snprintf(value, sizeof(value), "%s:%s", aSvcName, aArgs);
+
+  if (res < 0) {
+    HAL_ERR("snprintf: %s", strerror(errno));
+    return NS_ERROR_FAILURE;
+  } else if (static_cast<size_t>(res) >= sizeof(value)) {
+    HAL_ERR("snprintf: trunctated service name %s", aSvcName);
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (NS_WARN_IF(property_set("ctl.start", value) < 0)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  /* If the system service is not running, re-try later to start it.
+   *
+   * This condition happens when we restart a service immediately
+   * after it crashed, as the service state remains 'stopping'
+   * instead of 'stopped'. Due to the limitation of property service,
+   * hereby add delay. See Bug 1143925 Comment 41.
+   */
+  if (!SystemServiceIsRunning(aSvcName)) {
+    nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1");
+    if (!timer) {
+      return NS_ERROR_FAILURE;
+    }
+
+    RefPtr<StartSystemServiceTimerCallback> timerCallback =
+      new StartSystemServiceTimerCallback(aSvcName, aArgs);
+
+    timer->InitWithCallback(timerCallback,
+                            sRetryInterval,
+                            nsITimer::TYPE_ONE_SHOT);
+  }
+
+  return NS_OK;
+}
+
+void
+StopSystemService(const char* aSvcName)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  Unused << NS_WARN_IF(property_set("ctl.stop", aSvcName));
+}
+
+} // namespace hal_impl
+} // namespace mozilla