зеркало из https://github.com/mozilla/pjs.git
284 строки
8.0 KiB
C++
284 строки
8.0 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Geolocation.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* This is a derivative of work done by Google under a BSD style License.
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* See: http://gears.googlecode.com/svn/trunk/gears/geolocation/
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*
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* Contributor(s):
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* Doug Turner <dougt@meer.net> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsCOMPtr.h"
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#include "nsComponentManagerUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsThreadUtils.h"
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#include "nsXPCOM.h"
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#include "nsXPCOMCID.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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#include "nsWifiMonitor.h"
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#include "nsWifiAccessPoint.h"
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#include "nsServiceManagerUtils.h"
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#include "nsComponentManagerUtils.h"
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#include "mozilla/Services.h"
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using namespace mozilla;
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#if defined(PR_LOGGING)
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PRLogModuleInfo *gWifiMonitorLog;
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#endif
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NS_IMPL_THREADSAFE_ISUPPORTS3(nsWifiMonitor,
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nsIRunnable,
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nsIObserver,
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nsIWifiMonitor)
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nsWifiMonitor::nsWifiMonitor()
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: mKeepGoing(PR_TRUE)
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, mReentrantMonitor("nsWifiMonitor.mReentrantMonitor")
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{
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#if defined(PR_LOGGING)
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gWifiMonitorLog = PR_NewLogModule("WifiMonitor");
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#endif
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nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
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if (obsSvc)
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obsSvc->AddObserver(this, "xpcom-shutdown", PR_FALSE);
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LOG(("@@@@@ wifimonitor created\n"));
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}
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nsWifiMonitor::~nsWifiMonitor()
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{
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}
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NS_IMETHODIMP
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nsWifiMonitor::Observe(nsISupports *subject, const char *topic,
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const PRUnichar *data)
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{
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if (!strcmp(topic, "xpcom-shutdown")) {
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LOG(("Shutting down\n"));
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mKeepGoing = PR_FALSE;
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ReentrantMonitorAutoEnter mon(mReentrantMonitor);
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mon.Notify();
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsWifiMonitor::StartWatching(nsIWifiListener *aListener)
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{
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if (!aListener)
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return NS_ERROR_NULL_POINTER;
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nsresult rv = NS_OK;
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if (!mThread) {
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rv = NS_NewThread(getter_AddRefs(mThread), this);
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if (NS_FAILED(rv))
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return rv;
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}
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ReentrantMonitorAutoEnter mon(mReentrantMonitor);
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mKeepGoing = PR_TRUE;
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mListeners.AppendElement(nsWifiListener(aListener));
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// tell ourselves that we have a new watcher.
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mon.Notify();
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return NS_OK;
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}
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NS_IMETHODIMP nsWifiMonitor::StopWatching(nsIWifiListener *aListener)
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{
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if (!aListener)
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return NS_ERROR_NULL_POINTER;
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LOG(("removing listener\n"));
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ReentrantMonitorAutoEnter mon(mReentrantMonitor);
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for (PRUint32 i = 0; i < mListeners.Length(); i++) {
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if (mListeners[i].mListener == aListener) {
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mListeners.RemoveElementAt(i);
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break;
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}
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}
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if (mListeners.Length() == 0) {
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mKeepGoing = PR_FALSE;
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mon.Notify();
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mThread = nsnull;
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}
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return NS_OK;
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}
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class nsPassErrorToWifiListeners : public nsIRunnable
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIRUNNABLE
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nsPassErrorToWifiListeners(nsAutoPtr<nsCOMArray<nsIWifiListener> > aListeners,
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nsresult aResult)
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: mListeners(aListeners),
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mResult(aResult)
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{}
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private:
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nsAutoPtr<nsCOMArray<nsIWifiListener> > mListeners;
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nsresult mResult;
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};
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsPassErrorToWifiListeners,
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nsIRunnable)
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NS_IMETHODIMP nsPassErrorToWifiListeners::Run()
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{
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LOG(("About to send error to the wifi listeners\n"));
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for (PRInt32 i = 0; i < mListeners->Count(); i++) {
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nsresult rv = (*mListeners)[i]->OnError(mResult);
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LOG( ("... sent %d\n", rv));
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsWifiMonitor::Run()
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{
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LOG(("@@@@@ wifi monitor run called\n"));
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nsresult rv = DoScan();
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if (mKeepGoing && NS_FAILED(rv)) {
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nsAutoPtr<nsCOMArray<nsIWifiListener> > currentListeners(
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new nsCOMArray<nsIWifiListener>(mListeners.Length()));
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if (!currentListeners)
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return NS_ERROR_OUT_OF_MEMORY;
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for (PRUint32 i = 0; i < mListeners.Length(); i++)
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currentListeners->AppendObject(mListeners[i].mListener);
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nsCOMPtr<nsIThread> thread = do_GetMainThread();
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if (!thread)
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return NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIRunnable> runnable(new nsPassErrorToWifiListeners(currentListeners, rv));
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if (!runnable)
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return NS_ERROR_OUT_OF_MEMORY;
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thread->Dispatch(runnable, NS_DISPATCH_SYNC);
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}
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return NS_OK;
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}
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class nsCallWifiListeners : public nsIRunnable
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIRUNNABLE
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nsCallWifiListeners(nsAutoPtr<nsCOMArray<nsIWifiListener> > aListeners,
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nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > aAccessPoints)
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: mListeners(aListeners),
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mAccessPoints(aAccessPoints)
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{}
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private:
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nsAutoPtr<nsCOMArray<nsIWifiListener> > mListeners;
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nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > mAccessPoints;
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};
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsCallWifiListeners,
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nsIRunnable)
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NS_IMETHODIMP nsCallWifiListeners::Run()
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{
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LOG(("About to send data to the wifi listeners\n"));
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for (PRInt32 i = 0; i < mListeners->Count(); i++) {
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nsresult rv = (*mListeners)[i]->OnChange(mAccessPoints->Elements(),
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mAccessPoints->Length());
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LOG( ("... sent %d\n", rv));
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}
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return NS_OK;
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}
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nsresult
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nsWifiMonitor::CallWifiListeners(const nsCOMArray<nsWifiAccessPoint> &aAccessPoints,
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PRBool aAccessPointsChanged)
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{
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nsAutoPtr<nsCOMArray<nsIWifiListener> > currentListeners(
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new nsCOMArray<nsIWifiListener>(mListeners.Length()));
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if (!currentListeners)
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return NS_ERROR_OUT_OF_MEMORY;
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{
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ReentrantMonitorAutoEnter mon(mReentrantMonitor);
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for (PRUint32 i = 0; i < mListeners.Length(); i++) {
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if (!mListeners[i].mHasSentData || aAccessPointsChanged) {
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mListeners[i].mHasSentData = PR_TRUE;
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currentListeners->AppendObject(mListeners[i].mListener);
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}
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}
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}
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if (currentListeners->Count() > 0)
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{
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PRUint32 resultCount = aAccessPoints.Count();
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nsAutoPtr<nsTArray<nsIWifiAccessPoint*> > accessPoints(
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new nsTArray<nsIWifiAccessPoint *>(resultCount));
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if (!accessPoints)
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return NS_ERROR_OUT_OF_MEMORY;
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for (PRUint32 i = 0; i < resultCount; i++)
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accessPoints->AppendElement(aAccessPoints[i]);
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nsCOMPtr<nsIThread> thread = do_GetMainThread();
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if (!thread)
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return NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIRunnable> runnable(
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new nsCallWifiListeners(currentListeners, accessPoints));
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if (!runnable)
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return NS_ERROR_OUT_OF_MEMORY;
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thread->Dispatch(runnable, NS_DISPATCH_SYNC);
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}
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return NS_OK;
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}
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