michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsProxyRelease.h"
michael@0: #include "nsComponentManagerUtils.h"
michael@0: #include "nsServiceManagerUtils.h"
michael@0: #include "nsThreadUtils.h"
michael@0: #include "nsXPCOM.h"
michael@0: #include "nsXPCOMCID.h"
michael@0: #include "nsIObserver.h"
michael@0: #include "nsIObserverService.h"
michael@0: #include "nsWifiMonitor.h"
michael@0: #include "nsWifiAccessPoint.h"
michael@0: 
michael@0: #include "nsServiceManagerUtils.h"
michael@0: #include "nsComponentManagerUtils.h"
michael@0: #include "mozilla/Services.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: #if defined(PR_LOGGING)
michael@0: PRLogModuleInfo *gWifiMonitorLog;
michael@0: #endif
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsWifiMonitor,
michael@0:                   nsIRunnable,
michael@0:                   nsIObserver,
michael@0:                   nsIWifiMonitor)
michael@0: 
michael@0: nsWifiMonitor::nsWifiMonitor()
michael@0: : mKeepGoing(true)
michael@0: , mReentrantMonitor("nsWifiMonitor.mReentrantMonitor")
michael@0: {
michael@0: #if defined(PR_LOGGING)
michael@0:   gWifiMonitorLog = PR_NewLogModule("WifiMonitor");
michael@0: #endif
michael@0: 
michael@0:   nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
michael@0:   if (obsSvc)
michael@0:     obsSvc->AddObserver(this, "xpcom-shutdown", false);
michael@0: 
michael@0:   LOG(("@@@@@ wifimonitor created\n"));
michael@0: }
michael@0: 
michael@0: nsWifiMonitor::~nsWifiMonitor()
michael@0: {
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsWifiMonitor::Observe(nsISupports *subject, const char *topic,
michael@0:                      const char16_t *data)
michael@0: {
michael@0:   if (!strcmp(topic, "xpcom-shutdown")) {
michael@0:     LOG(("Shutting down\n"));
michael@0:     mKeepGoing = false;
michael@0: 
michael@0:     ReentrantMonitorAutoEnter mon(mReentrantMonitor);
michael@0:     mon.Notify();
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP nsWifiMonitor::StartWatching(nsIWifiListener *aListener)
michael@0: {
michael@0:   if (!aListener)
michael@0:     return NS_ERROR_NULL_POINTER;
michael@0: 
michael@0:   nsresult rv = NS_OK;
michael@0:   if (!mThread) {
michael@0:     rv = NS_NewThread(getter_AddRefs(mThread), this);
michael@0:     if (NS_FAILED(rv))
michael@0:       return rv;
michael@0:   }
michael@0: 
michael@0:   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
michael@0: 
michael@0:   mKeepGoing = true;
michael@0: 
michael@0:   mListeners.AppendElement(nsWifiListener(new nsMainThreadPtrHolder<nsIWifiListener>(aListener)));
michael@0: 
michael@0:   // tell ourselves that we have a new watcher.
michael@0:   mon.Notify();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsWifiMonitor::StopWatching(nsIWifiListener *aListener)
michael@0: {
michael@0:   if (!aListener)
michael@0:     return NS_ERROR_NULL_POINTER;
michael@0: 
michael@0:   LOG(("removing listener\n"));
michael@0: 
michael@0:   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
michael@0: 
michael@0:   for (uint32_t i = 0; i < mListeners.Length(); i++) {
michael@0: 
michael@0:     if (mListeners[i].mListener == aListener) {
michael@0:       mListeners.RemoveElementAt(i);
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   if (mListeners.Length() == 0) {
michael@0:     mKeepGoing = false;
michael@0:     mon.Notify();
michael@0:     mThread = nullptr;
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: typedef nsTArray<nsMainThreadPtrHandle<nsIWifiListener> > WifiListenerArray;
michael@0: 
michael@0: class nsPassErrorToWifiListeners MOZ_FINAL : public nsIRunnable
michael@0: {
michael@0:  public:
michael@0:   NS_DECL_THREADSAFE_ISUPPORTS
michael@0:   NS_DECL_NSIRUNNABLE
michael@0: 
michael@0:   nsPassErrorToWifiListeners(nsAutoPtr<WifiListenerArray> aListeners,
michael@0:                              nsresult aResult)
michael@0:   : mListeners(aListeners),
michael@0:     mResult(aResult)
michael@0:   {}
michael@0: 
michael@0:  private:
michael@0:   nsAutoPtr<WifiListenerArray> mListeners;
michael@0:   nsresult mResult;
michael@0: };
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsPassErrorToWifiListeners,
michael@0:                   nsIRunnable)
michael@0: 
michael@0: NS_IMETHODIMP nsPassErrorToWifiListeners::Run()
michael@0: {
michael@0:   LOG(("About to send error to the wifi listeners\n"));
michael@0:   for (size_t i = 0; i < mListeners->Length(); i++) {
michael@0:     (*mListeners)[i]->OnError(mResult);
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsWifiMonitor::Run()
michael@0: {
michael@0:   LOG(("@@@@@ wifi monitor run called\n"));
michael@0: 
michael@0:   PR_SetCurrentThreadName("Wifi Monitor");
michael@0: 
michael@0:   nsresult rv = DoScan();
michael@0: 
michael@0:   if (mKeepGoing && NS_FAILED(rv)) {
michael@0:     nsAutoPtr<WifiListenerArray> currentListeners(
michael@0:                            new WifiListenerArray(mListeners.Length()));
michael@0:     if (!currentListeners)
michael@0:       return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:     for (uint32_t i = 0; i < mListeners.Length(); i++)
michael@0:       currentListeners->AppendElement(mListeners[i].mListener);
michael@0: 
michael@0:     nsCOMPtr<nsIThread> thread = do_GetMainThread();
michael@0:     if (!thread)
michael@0:       return NS_ERROR_UNEXPECTED;
michael@0: 
michael@0:     nsCOMPtr<nsIRunnable> runnable(new nsPassErrorToWifiListeners(currentListeners, rv));
michael@0:     if (!runnable)
michael@0:       return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:     thread->Dispatch(runnable, NS_DISPATCH_SYNC);
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: class nsCallWifiListeners MOZ_FINAL : public nsIRunnable
michael@0: {
michael@0:  public:
michael@0:   NS_DECL_THREADSAFE_ISUPPORTS
michael@0:   NS_DECL_NSIRUNNABLE
michael@0: 
michael@0:   nsCallWifiListeners(nsAutoPtr<WifiListenerArray> aListeners,
michael@0:                       nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > aAccessPoints)
michael@0:   : mListeners(aListeners),
michael@0:     mAccessPoints(aAccessPoints)
michael@0:   {}
michael@0: 
michael@0:  private:
michael@0:   nsAutoPtr<WifiListenerArray> mListeners;
michael@0:   nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > mAccessPoints;
michael@0: };
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsCallWifiListeners,
michael@0:                   nsIRunnable)
michael@0: 
michael@0: NS_IMETHODIMP nsCallWifiListeners::Run()
michael@0: {
michael@0:   LOG(("About to send data to the wifi listeners\n"));
michael@0:   for (size_t i = 0; i < mListeners->Length(); i++) {
michael@0:     (*mListeners)[i]->OnChange(mAccessPoints->Elements(), mAccessPoints->Length());
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsWifiMonitor::CallWifiListeners(const nsCOMArray<nsWifiAccessPoint> &aAccessPoints,
michael@0:                                  bool aAccessPointsChanged)
michael@0: {
michael@0:     nsAutoPtr<WifiListenerArray> currentListeners(
michael@0:                            new WifiListenerArray(mListeners.Length()));
michael@0:     if (!currentListeners)
michael@0:       return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:     {
michael@0:       ReentrantMonitorAutoEnter mon(mReentrantMonitor);
michael@0: 
michael@0:       for (uint32_t i = 0; i < mListeners.Length(); i++) {
michael@0:         if (!mListeners[i].mHasSentData || aAccessPointsChanged) {
michael@0:           mListeners[i].mHasSentData = true;
michael@0:           currentListeners->AppendElement(mListeners[i].mListener);
michael@0:         }
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     if (currentListeners->Length() > 0)
michael@0:     {
michael@0:       uint32_t resultCount = aAccessPoints.Count();
michael@0:       nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > accessPoints(
michael@0:                                new nsTArray<nsIWifiAccessPoint *>(resultCount));
michael@0:       if (!accessPoints)
michael@0:         return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:       for (uint32_t i = 0; i < resultCount; i++)
michael@0:         accessPoints->AppendElement(aAccessPoints[i]);
michael@0: 
michael@0:       nsCOMPtr<nsIThread> thread = do_GetMainThread();
michael@0:       if (!thread)
michael@0:         return NS_ERROR_UNEXPECTED;
michael@0: 
michael@0:       nsCOMPtr<nsIRunnable> runnable(
michael@0:                       new nsCallWifiListeners(currentListeners, accessPoints));
michael@0:       if (!runnable)
michael@0:         return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:       thread->Dispatch(runnable, NS_DISPATCH_SYNC);
michael@0:     }
michael@0: 
michael@0:     return NS_OK;
michael@0: }