From f1e484acb594a726fb57ad0ae4cfe902c7f35858 Mon Sep 17 00:00:00 2001
From: The Android Open Source Project <initial-contribution@android.com>
Date: Thu, 22 Jan 2009 00:13:42 -0800
Subject: auto import from //branches/cupcake/...@127436

---
 .../internal/location/GpsLocationProvider.java     | 34 ++++++++++++++++++----
 1 file changed, 29 insertions(+), 5 deletions(-)

(limited to 'location')

diff --git a/location/java/com/android/internal/location/GpsLocationProvider.java b/location/java/com/android/internal/location/GpsLocationProvider.java
index 3d4d4a2..c6f13c9 100644
--- a/location/java/com/android/internal/location/GpsLocationProvider.java
+++ b/location/java/com/android/internal/location/GpsLocationProvider.java
@@ -155,6 +155,7 @@ public class GpsLocationProvider extends LocationProviderImpl {
     private ArrayList<Listener> mListeners = new ArrayList<Listener>();
     private GpsEventThread mEventThread;
     private GpsNetworkThread mNetworkThread;
+    private Object mNetworkThreadLock = new Object();
    
     // how often to request NTP time, in milliseconds
     // current setting 4 hours
@@ -301,8 +302,9 @@ public class GpsLocationProvider extends LocationProviderImpl {
      * when the provider is enabled.
      */
     @Override
-    public void enable() {
+    public synchronized void enable() {
         if (Config.LOGD) Log.d(TAG, "enable");
+        if (mEnabled) return;
         mEnabled = native_init();
 
         if (mEnabled) {
@@ -330,8 +332,10 @@ public class GpsLocationProvider extends LocationProviderImpl {
      * down while the provider is disabled.
      */
     @Override
-    public void disable() {
+    public synchronized void disable() {
         if (Config.LOGD) Log.d(TAG, "disable");
+        if (!mEnabled) return;
+
         mEnabled = false;
         stopNavigating();
         native_disable();
@@ -346,6 +350,11 @@ public class GpsLocationProvider extends LocationProviderImpl {
             mEventThread = null;
         }
 
+        if (mNetworkThread != null) {
+            mNetworkThread.setDone();
+            mNetworkThread = null;
+        }
+
         native_cleanup();
     }
 
@@ -745,12 +754,21 @@ public class GpsLocationProvider extends LocationProviderImpl {
         private long mNextNtpTime = 0;
         private long mNextXtraTime = 0;
         private boolean mXtraDownloadRequested = false;
+        private boolean mDone = false;
 
         public GpsNetworkThread() {
             super("GpsNetworkThread");
         }
 
         public void run() {
+            synchronized (mNetworkThreadLock) {
+                if (!mDone) {
+                    runLocked();
+                }
+            }
+        }
+
+        public void runLocked() {
             if (Config.LOGD) Log.d(TAG, "NetworkThread starting");
             
             SntpClient client = new SntpClient();
@@ -761,7 +779,7 @@ public class GpsLocationProvider extends LocationProviderImpl {
             }
             
             // thread exits after disable() is called
-            while (mEnabled) {
+            while (!mDone) {
                 long waitTime = getWaitTime();
                 do {                        
                     synchronized (this) {
@@ -784,11 +802,11 @@ public class GpsLocationProvider extends LocationProviderImpl {
                         }
                     }
                     waitTime = getWaitTime();
-                } while (mEnabled && ((!mXtraDownloadRequested && waitTime > 0)
+                } while (!mDone && ((!mXtraDownloadRequested && waitTime > 0)
                         || !mNetworkAvailable));
                 if (Config.LOGD) Log.d(TAG, "NetworkThread out of wake loop");
                 
-                if (mEnabled) {
+                if (!mDone) {
                     if (mNtpServer != null && 
                             mNextNtpTime <= System.currentTimeMillis()) {
                         if (Config.LOGD) {
@@ -840,6 +858,12 @@ public class GpsLocationProvider extends LocationProviderImpl {
             notify();
         }
 
+        synchronized void setDone() {
+            if (Config.LOGD) Log.d(TAG, "stopping NetworkThread");
+            mDone = true;
+            notify();
+        }
+
         private long getWaitTime() {
             long now = System.currentTimeMillis();
             long waitTime = Long.MAX_VALUE;
-- 
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