Examples with ICancellationSignal android.os.ICancellationSignal used on opensource projects

Example 1 with ICancellationSignal

use of android.os.ICancellationSignal in project android_frameworks_base by ResurrectionRemix.

the class ContentProviderClient method openTypedAssetFileDescriptor.

/** See {@link ContentProvider#openTypedAssetFile ContentProvider.openTypedAssetFile} */
@Nullable
public final AssetFileDescriptor openTypedAssetFileDescriptor(@NonNull Uri uri, @NonNull String mimeType, @Nullable Bundle opts, @Nullable CancellationSignal signal) throws RemoteException, FileNotFoundException {
    Preconditions.checkNotNull(uri, "uri");
    Preconditions.checkNotNull(mimeType, "mimeType");
    beforeRemote();
    try {
        ICancellationSignal remoteSignal = null;
        if (signal != null) {
            signal.throwIfCanceled();
            remoteSignal = mContentProvider.createCancellationSignal();
            signal.setRemote(remoteSignal);
        }
        return mContentProvider.openTypedAssetFile(mPackageName, uri, mimeType, opts, remoteSignal);
    } catch (DeadObjectException e) {
        if (!mStable) {
            mContentResolver.unstableProviderDied(mContentProvider);
        }
        throw e;
    } finally {
        afterRemote();
    }
}

Example 2 with ICancellationSignal

use of android.os.ICancellationSignal in project android_frameworks_base by ResurrectionRemix.

the class ContentResolver method query.

/**
     * Query the given URI, returning a {@link Cursor} over the result set
     * with optional support for cancellation.
     * <p>
     * For best performance, the caller should follow these guidelines:
     * <ul>
     * <li>Provide an explicit projection, to prevent
     * reading data from storage that aren't going to be used.</li>
     * <li>Use question mark parameter markers such as 'phone=?' instead of
     * explicit values in the {@code selection} parameter, so that queries
     * that differ only by those values will be recognized as the same
     * for caching purposes.</li>
     * </ul>
     * </p>
     *
     * @param uri The URI, using the content:// scheme, for the content to
     *         retrieve.
     * @param projection A list of which columns to return. Passing null will
     *         return all columns, which is inefficient.
     * @param selection A filter declaring which rows to return, formatted as an
     *         SQL WHERE clause (excluding the WHERE itself). Passing null will
     *         return all rows for the given URI.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in the order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param sortOrder How to order the rows, formatted as an SQL ORDER BY
     *         clause (excluding the ORDER BY itself). Passing null will use the
     *         default sort order, which may be unordered.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A Cursor object, which is positioned before the first entry, or null
     * @see Cursor
     */
@Nullable
public final Cursor query(@RequiresPermission.Read @NonNull final Uri uri, @Nullable String[] projection, @Nullable String selection, @Nullable String[] selectionArgs, @Nullable String sortOrder, @Nullable CancellationSignal cancellationSignal) {
    android.util.SeempLog.record_uri(13, uri);
    Preconditions.checkNotNull(uri, "uri");
    IContentProvider unstableProvider = acquireUnstableProvider(uri);
    if (unstableProvider == null) {
        return null;
    }
    IContentProvider stableProvider = null;
    Cursor qCursor = null;
    try {
        long startTime = SystemClock.uptimeMillis();
        ICancellationSignal remoteCancellationSignal = null;
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
            remoteCancellationSignal = unstableProvider.createCancellationSignal();
            cancellationSignal.setRemote(remoteCancellationSignal);
        }
        try {
            qCursor = unstableProvider.query(mPackageName, uri, projection, selection, selectionArgs, sortOrder, remoteCancellationSignal);
        } catch (DeadObjectException e) {
            // The remote process has died...  but we only hold an unstable
            // reference though, so we might recover!!!  Let's try!!!!
            // This is exciting!!1!!1!!!!1
            unstableProviderDied(unstableProvider);
            stableProvider = acquireProvider(uri);
            if (stableProvider == null) {
                return null;
            }
            qCursor = stableProvider.query(mPackageName, uri, projection, selection, selectionArgs, sortOrder, remoteCancellationSignal);
        }
        if (qCursor == null) {
            return null;
        }
        // Force query execution.  Might fail and throw a runtime exception here.
        qCursor.getCount();
        long durationMillis = SystemClock.uptimeMillis() - startTime;
        maybeLogQueryToEventLog(durationMillis, uri, projection, selection, sortOrder);
        // Wrap the cursor object into CursorWrapperInner object.
        final IContentProvider provider = (stableProvider != null) ? stableProvider : acquireProvider(uri);
        final CursorWrapperInner wrapper = new CursorWrapperInner(qCursor, provider);
        stableProvider = null;
        qCursor = null;
        return wrapper;
    } catch (RemoteException e) {
        // Manager will kill this process shortly anyway.
        return null;
    } finally {
        if (qCursor != null) {
            qCursor.close();
        }
        if (cancellationSignal != null) {
            cancellationSignal.setRemote(null);
        }
        if (unstableProvider != null) {
            releaseUnstableProvider(unstableProvider);
        }
        if (stableProvider != null) {
            releaseProvider(stableProvider);
        }
    }
}

Example 3 with ICancellationSignal

use of android.os.ICancellationSignal in project android_frameworks_base by DirtyUnicorns.

the class ContentProviderClient method query.

/** See {@link ContentProvider#query ContentProvider.query} */
@Nullable
public Cursor query(@NonNull Uri url, @Nullable String[] projection, @Nullable String selection, @Nullable String[] selectionArgs, @Nullable String sortOrder, @Nullable CancellationSignal cancellationSignal) throws RemoteException {
    Preconditions.checkNotNull(url, "url");
    beforeRemote();
    try {
        ICancellationSignal remoteCancellationSignal = null;
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
            remoteCancellationSignal = mContentProvider.createCancellationSignal();
            cancellationSignal.setRemote(remoteCancellationSignal);
        }
        final Cursor cursor = mContentProvider.query(mPackageName, url, projection, selection, selectionArgs, sortOrder, remoteCancellationSignal);
        if (cursor == null) {
            return null;
        }
        if ("com.google.android.gms".equals(mPackageName)) {
            // They're casting to a concrete subclass, sigh
            return cursor;
        } else {
            return new CursorWrapperInner(cursor);
        }
    } catch (DeadObjectException e) {
        if (!mStable) {
            mContentResolver.unstableProviderDied(mContentProvider);
        }
        throw e;
    } finally {
        afterRemote();
    }
}

Example 4 with ICancellationSignal

use of android.os.ICancellationSignal in project android_frameworks_base by DirtyUnicorns.

the class ContentProviderClient method openAssetFile.

/**
     * See {@link ContentProvider#openAssetFile ContentProvider.openAssetFile}.
     * Note that this <em>does not</em>
     * take care of non-content: URIs such as file:.  It is strongly recommended
     * you use the {@link ContentResolver#openAssetFileDescriptor
     * ContentResolver.openAssetFileDescriptor} API instead.
     */
@Nullable
public AssetFileDescriptor openAssetFile(@NonNull Uri url, @NonNull String mode, @Nullable CancellationSignal signal) throws RemoteException, FileNotFoundException {
    Preconditions.checkNotNull(url, "url");
    Preconditions.checkNotNull(mode, "mode");
    beforeRemote();
    try {
        ICancellationSignal remoteSignal = null;
        if (signal != null) {
            signal.throwIfCanceled();
            remoteSignal = mContentProvider.createCancellationSignal();
            signal.setRemote(remoteSignal);
        }
        return mContentProvider.openAssetFile(mPackageName, url, mode, remoteSignal);
    } catch (DeadObjectException e) {
        if (!mStable) {
            mContentResolver.unstableProviderDied(mContentProvider);
        }
        throw e;
    } finally {
        afterRemote();
    }
}

Example 5 with ICancellationSignal

use of android.os.ICancellationSignal in project android_frameworks_base by DirtyUnicorns.

the class ContentProviderClient method openTypedAssetFileDescriptor.

/** See {@link ContentProvider#openTypedAssetFile ContentProvider.openTypedAssetFile} */
@Nullable
public final AssetFileDescriptor openTypedAssetFileDescriptor(@NonNull Uri uri, @NonNull String mimeType, @Nullable Bundle opts, @Nullable CancellationSignal signal) throws RemoteException, FileNotFoundException {
    Preconditions.checkNotNull(uri, "uri");
    Preconditions.checkNotNull(mimeType, "mimeType");
    beforeRemote();
    try {
        ICancellationSignal remoteSignal = null;
        if (signal != null) {
            signal.throwIfCanceled();
            remoteSignal = mContentProvider.createCancellationSignal();
            signal.setRemote(remoteSignal);
        }
        return mContentProvider.openTypedAssetFile(mPackageName, uri, mimeType, opts, remoteSignal);
    } catch (DeadObjectException e) {
        if (!mStable) {
            mContentResolver.unstableProviderDied(mContentProvider);
        }
        throw e;
    } finally {
        afterRemote();
    }
}