Implement a cancelation mechanism for queries.

Added new API to enable cancelation of SQLite and content provider
queries by means of a CancelationSignal object.  The application
creates a CancelationSignal object and passes it as an argument
to the query.  The cancelation signal can then be used to cancel
the query while it is executing.

If the cancelation signal is raised before the query is executed,
then it is immediately terminated.

Change-Id: If2c76e9a7e56ea5e98768b6d4f225f0a1ca61c61

3 files changed, 16 insertions, 16 deletions

diff --git a/media/java/android/media/MediaScanner.java b/media/java/android/media/MediaScanner.java
index b06ef95..5cc93ea 100644
--- a/media/java/android/media/MediaScanner.java
+++ b/media/java/android/media/MediaScanner.java
@@ -1035,7 +1035,7 @@ public class MediaScanner
                 // First read existing files from the files table
 
                 c = mMediaProvider.query(mFilesUri, FILES_PRESCAN_PROJECTION,
-                        where, selectionArgs, null);
+                        where, selectionArgs, null, null);
 
                 if (c != null) {
                     mWasEmptyPriorToScan = c.getCount() == 0;
@@ -1072,7 +1072,7 @@ public class MediaScanner
 
         // compute original size of images
         mOriginalCount = 0;
-        c = mMediaProvider.query(mImagesUri, ID_PROJECTION, null, null, null);
+        c = mMediaProvider.query(mImagesUri, ID_PROJECTION, null, null, null, null);
         if (c != null) {
             mOriginalCount = c.getCount();
             c.close();
@@ -1107,7 +1107,7 @@ public class MediaScanner
                     new String [] { "_data" },
                     null,
                     null,
-                    null);
+                    null, null);
             Log.v(TAG, "pruneDeadThumbnailFiles... " + c);
             if (c != null && c.moveToFirst()) {
                 do {
@@ -1472,7 +1472,7 @@ public class MediaScanner
             if (bestMatch.mRowId == 0) {
                 Cursor c = mMediaProvider.query(mAudioUri, ID_PROJECTION,
                         MediaStore.Files.FileColumns.DATA + "=?",
-                        new String[] { bestMatch.mPath }, null);
+                        new String[] { bestMatch.mPath }, null, null);
                 if (c != null) {
                     if (c.moveToNext()) {
                         bestMatch.mRowId = c.getLong(0);
diff --git a/media/java/android/mtp/MtpDatabase.java b/media/java/android/mtp/MtpDatabase.java
index 19db1c0..268c9fc 100755
--- a/media/java/android/mtp/MtpDatabase.java
+++ b/media/java/android/mtp/MtpDatabase.java
@@ -266,7 +266,7 @@ public class MtpDatabase {
             Cursor c = null;
             try {
                 c = mMediaProvider.query(mObjectsUri, ID_PROJECTION, PATH_WHERE,
-                        new String[] { path }, null);
+                        new String[] { path }, null, null);
                 if (c != null && c.getCount() > 0) {
                     Log.w(TAG, "file already exists in beginSendObject: " + path);
                     return -1;
@@ -433,7 +433,7 @@ public class MtpDatabase {
             }
         }
 
-        return mMediaProvider.query(mObjectsUri, ID_PROJECTION, where, whereArgs, null);
+        return mMediaProvider.query(mObjectsUri, ID_PROJECTION, where, whereArgs, null, null);
     }
 
     private int[] getObjectList(int storageID, int format, int parent) {
@@ -699,7 +699,7 @@ public class MtpDatabase {
         String path = null;
         String[] whereArgs = new String[] {  Integer.toString(handle) };
         try {
-            c = mMediaProvider.query(mObjectsUri, PATH_PROJECTION, ID_WHERE, whereArgs, null);
+            c = mMediaProvider.query(mObjectsUri, PATH_PROJECTION, ID_WHERE, whereArgs, null, null);
             if (c != null && c.moveToNext()) {
                 path = c.getString(1);
             }
@@ -815,7 +815,7 @@ public class MtpDatabase {
         Cursor c = null;
         try {
             c = mMediaProvider.query(mObjectsUri, OBJECT_INFO_PROJECTION,
-                            ID_WHERE, new String[] {  Integer.toString(handle) }, null);
+                            ID_WHERE, new String[] {  Integer.toString(handle) }, null, null);
             if (c != null && c.moveToNext()) {
                 outStorageFormatParent[0] = c.getInt(1);
                 outStorageFormatParent[1] = c.getInt(2);
@@ -858,7 +858,7 @@ public class MtpDatabase {
         Cursor c = null;
         try {
             c = mMediaProvider.query(mObjectsUri, PATH_SIZE_FORMAT_PROJECTION,
-                            ID_WHERE, new String[] {  Integer.toString(handle) }, null);
+                            ID_WHERE, new String[] {  Integer.toString(handle) }, null, null);
             if (c != null && c.moveToNext()) {
                 String path = c.getString(1);
                 path.getChars(0, path.length(), outFilePath, 0);
@@ -887,7 +887,7 @@ public class MtpDatabase {
         Cursor c = null;
         try {
             c = mMediaProvider.query(mObjectsUri, PATH_SIZE_FORMAT_PROJECTION,
-                            ID_WHERE, new String[] {  Integer.toString(handle) }, null);
+                            ID_WHERE, new String[] {  Integer.toString(handle) }, null, null);
             if (c != null && c.moveToNext()) {
                 // don't convert to media path here, since we will be matching
                 // against paths in the database matching /data/media
@@ -933,7 +933,7 @@ public class MtpDatabase {
         Uri uri = Files.getMtpReferencesUri(mVolumeName, handle);
         Cursor c = null;
         try {
-            c = mMediaProvider.query(uri, ID_PROJECTION, null, null, null);
+            c = mMediaProvider.query(uri, ID_PROJECTION, null, null, null, null);
             if (c == null) {
                 return null;
             }
diff --git a/media/java/android/mtp/MtpPropertyGroup.java b/media/java/android/mtp/MtpPropertyGroup.java
index 76c8569..dab5454 100644
--- a/media/java/android/mtp/MtpPropertyGroup.java
+++ b/media/java/android/mtp/MtpPropertyGroup.java
@@ -191,7 +191,7 @@ class MtpPropertyGroup {
             // for now we are only reading properties from the "objects" table
             c = mProvider.query(mUri,
                             new String [] { Files.FileColumns._ID, column },
-                            ID_WHERE, new String[] { Integer.toString(id) }, null);
+                            ID_WHERE, new String[] { Integer.toString(id) }, null, null);
             if (c != null && c.moveToNext()) {
                 return c.getString(1);
             } else {
@@ -211,7 +211,7 @@ class MtpPropertyGroup {
         try {
             c = mProvider.query(Audio.Media.getContentUri(mVolumeName),
                             new String [] { Files.FileColumns._ID, column },
-                            ID_WHERE, new String[] { Integer.toString(id) }, null);
+                            ID_WHERE, new String[] { Integer.toString(id) }, null, null);
             if (c != null && c.moveToNext()) {
                 return c.getString(1);
             } else {
@@ -232,7 +232,7 @@ class MtpPropertyGroup {
             Uri uri = Audio.Genres.getContentUriForAudioId(mVolumeName, id);
             c = mProvider.query(uri,
                             new String [] { Files.FileColumns._ID, Audio.GenresColumns.NAME },
-                            null, null, null);
+                            null, null, null, null);
             if (c != null && c.moveToNext()) {
                 return c.getString(1);
             } else {
@@ -254,7 +254,7 @@ class MtpPropertyGroup {
             // for now we are only reading properties from the "objects" table
             c = mProvider.query(mUri,
                             new String [] { Files.FileColumns._ID, column },
-                            ID_WHERE, new String[] { Integer.toString(id) }, null);
+                            ID_WHERE, new String[] { Integer.toString(id) }, null, null);
             if (c != null && c.moveToNext()) {
                 return new Long(c.getLong(1));
             }
@@ -323,7 +323,7 @@ class MtpPropertyGroup {
         try {
             // don't query if not necessary
             if (depth > 0 || handle == 0xFFFFFFFF || mColumns.length > 1) {
-                c = mProvider.query(mUri, mColumns, where, whereArgs, null);
+                c = mProvider.query(mUri, mColumns, where, whereArgs, null, null);
                 if (c == null) {
                     return new MtpPropertyList(0, MtpConstants.RESPONSE_INVALID_OBJECT_HANDLE);
                 }