The Tor Browser: netwerk/wifi/nsWifiMonitor.cpp@b8a032363ba2 (annotated)

netwerk/wifi/nsWifiMonitor.cpp@b8a032363ba2 (annotated)

netwerk/wifi/nsWifiMonitor.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* 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 "nsCOMPtr.h"
 #include "nsProxyRelease.h"
 #include "nsComponentManagerUtils.h"
 #include "nsServiceManagerUtils.h"
 #include "nsThreadUtils.h"
 #include "nsXPCOM.h"
 #include "nsXPCOMCID.h"
 #include "nsIObserver.h"
 #include "nsIObserverService.h"
 #include "nsWifiMonitor.h"
 #include "nsWifiAccessPoint.h"
 #include "nsServiceManagerUtils.h"
 #include "nsComponentManagerUtils.h"
 #include "mozilla/Services.h"
 using namespace mozilla;
 #if defined(PR_LOGGING)
 PRLogModuleInfo *gWifiMonitorLog;
 #endif
 NS_IMPL_ISUPPORTS(nsWifiMonitor,
                   nsIRunnable,
                   nsIObserver,
                   nsIWifiMonitor)
 nsWifiMonitor::nsWifiMonitor()
 : mKeepGoing(true)
 , mReentrantMonitor("nsWifiMonitor.mReentrantMonitor")
 {
 #if defined(PR_LOGGING)
   gWifiMonitorLog = PR_NewLogModule("WifiMonitor");
 #endif
   nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
   if (obsSvc)
     obsSvc->AddObserver(this, "xpcom-shutdown", false);
   LOG(("@@@@@ wifimonitor created\n"));
 }
 nsWifiMonitor::~nsWifiMonitor()
 {
 }
 NS_IMETHODIMP
 nsWifiMonitor::Observe(nsISupports *subject, const char *topic,
                      const char16_t *data)
 {
   if (!strcmp(topic, "xpcom-shutdown")) {
     LOG(("Shutting down\n"));
     mKeepGoing = false;
     ReentrantMonitorAutoEnter mon(mReentrantMonitor);
     mon.Notify();
   }
   return NS_OK;
 }
 NS_IMETHODIMP nsWifiMonitor::StartWatching(nsIWifiListener *aListener)
 {
   if (!aListener)
     return NS_ERROR_NULL_POINTER;
   nsresult rv = NS_OK;
   if (!mThread) {
     rv = NS_NewThread(getter_AddRefs(mThread), this);
     if (NS_FAILED(rv))
       return rv;
   }
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   mKeepGoing = true;
   mListeners.AppendElement(nsWifiListener(new nsMainThreadPtrHolder<nsIWifiListener>(aListener)));
   // tell ourselves that we have a new watcher.
   mon.Notify();
   return NS_OK;
 }
 NS_IMETHODIMP nsWifiMonitor::StopWatching(nsIWifiListener *aListener)
 {
   if (!aListener)
     return NS_ERROR_NULL_POINTER;
   LOG(("removing listener\n"));
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   for (uint32_t i = 0; i < mListeners.Length(); i++) {
     if (mListeners[i].mListener == aListener) {
       mListeners.RemoveElementAt(i);
       break;
     }
   }
   if (mListeners.Length() == 0) {
     mKeepGoing = false;
     mon.Notify();
     mThread = nullptr;
   }
   return NS_OK;
 }
 typedef nsTArray<nsMainThreadPtrHandle<nsIWifiListener> > WifiListenerArray;
 class nsPassErrorToWifiListeners MOZ_FINAL : public nsIRunnable
 {
  public:
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSIRUNNABLE
   nsPassErrorToWifiListeners(nsAutoPtr<WifiListenerArray> aListeners,
                              nsresult aResult)
   : mListeners(aListeners),
     mResult(aResult)
   {}
  private:
   nsAutoPtr<WifiListenerArray> mListeners;
   nsresult mResult;
 };
 NS_IMPL_ISUPPORTS(nsPassErrorToWifiListeners,
                   nsIRunnable)
 NS_IMETHODIMP nsPassErrorToWifiListeners::Run()
 {
   LOG(("About to send error to the wifi listeners\n"));
   for (size_t i = 0; i < mListeners->Length(); i++) {
     (*mListeners)[i]->OnError(mResult);
   }
   return NS_OK;
 }
 NS_IMETHODIMP nsWifiMonitor::Run()
 {
   LOG(("@@@@@ wifi monitor run called\n"));
   PR_SetCurrentThreadName("Wifi Monitor");
   nsresult rv = DoScan();
   if (mKeepGoing && NS_FAILED(rv)) {
     nsAutoPtr<WifiListenerArray> currentListeners(
                            new WifiListenerArray(mListeners.Length()));
     if (!currentListeners)
       return NS_ERROR_OUT_OF_MEMORY;
     for (uint32_t i = 0; i < mListeners.Length(); i++)
       currentListeners->AppendElement(mListeners[i].mListener);
     nsCOMPtr<nsIThread> thread = do_GetMainThread();
     if (!thread)
       return NS_ERROR_UNEXPECTED;
     nsCOMPtr<nsIRunnable> runnable(new nsPassErrorToWifiListeners(currentListeners, rv));
     if (!runnable)
       return NS_ERROR_OUT_OF_MEMORY;
     thread->Dispatch(runnable, NS_DISPATCH_SYNC);
   }
   return NS_OK;
 }
 class nsCallWifiListeners MOZ_FINAL : public nsIRunnable
 {
  public:
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSIRUNNABLE
   nsCallWifiListeners(nsAutoPtr<WifiListenerArray> aListeners,
                       nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > aAccessPoints)
   : mListeners(aListeners),
     mAccessPoints(aAccessPoints)
   {}
  private:
   nsAutoPtr<WifiListenerArray> mListeners;
   nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > mAccessPoints;
 };
 NS_IMPL_ISUPPORTS(nsCallWifiListeners,
                   nsIRunnable)
 NS_IMETHODIMP nsCallWifiListeners::Run()
 {
   LOG(("About to send data to the wifi listeners\n"));
   for (size_t i = 0; i < mListeners->Length(); i++) {
     (*mListeners)[i]->OnChange(mAccessPoints->Elements(), mAccessPoints->Length());
   }
   return NS_OK;
 }
 nsresult
 nsWifiMonitor::CallWifiListeners(const nsCOMArray<nsWifiAccessPoint> &aAccessPoints,
                                  bool aAccessPointsChanged)
 {
     nsAutoPtr<WifiListenerArray> currentListeners(
                            new WifiListenerArray(mListeners.Length()));
     if (!currentListeners)
       return NS_ERROR_OUT_OF_MEMORY;
     {
       ReentrantMonitorAutoEnter mon(mReentrantMonitor);
       for (uint32_t i = 0; i < mListeners.Length(); i++) {
         if (!mListeners[i].mHasSentData || aAccessPointsChanged) {
           mListeners[i].mHasSentData = true;
           currentListeners->AppendElement(mListeners[i].mListener);
         }
       }
     }
     if (currentListeners->Length() > 0)
     {
       uint32_t resultCount = aAccessPoints.Count();
       nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > accessPoints(
                                new nsTArray<nsIWifiAccessPoint *>(resultCount));
       if (!accessPoints)
         return NS_ERROR_OUT_OF_MEMORY;
       for (uint32_t i = 0; i < resultCount; i++)
         accessPoints->AppendElement(aAccessPoints[i]);
       nsCOMPtr<nsIThread> thread = do_GetMainThread();
       if (!thread)
         return NS_ERROR_UNEXPECTED;
       nsCOMPtr<nsIRunnable> runnable(
                       new nsCallWifiListeners(currentListeners, accessPoints));
       if (!runnable)
         return NS_ERROR_OUT_OF_MEMORY;
       thread->Dispatch(runnable, NS_DISPATCH_SYNC);
     }
     return NS_OK;
 }

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netwerk/wifi/nsWifiMonitor.cpp@b8a032363ba2 (annotated)

netwerk/wifi/nsWifiMonitor.cpp