Add fsync(2) and fdatasync(2).

Interesting parts to this change:
* first BlockGuard support (and general delegation support).
* first rethrowing of ErrnoException as IOException.
* switching FileChannelImpl from int to FileDescriptor.

The special case in FileDescriptor.sync has been removed. Testing with the RI
showed that it doesn't treat syncing a FileDescriptor that corresponds to a
socket as a special case --- it throws SyncFailedException just like normal.

Bug: 3107501
Change-Id: I99faf120bd802aec0397a79772ed38c5e1542fed

1 files changed, 0 insertions, 5 deletions

diff --git a/dalvik/src/main/java/dalvik/system/BlockGuard.java b/dalvik/src/main/java/dalvik/system/BlockGuard.java
index d2d6862..6e333dc 100644
--- a/dalvik/src/main/java/dalvik/system/BlockGuard.java
+++ b/dalvik/src/main/java/dalvik/system/BlockGuard.java
@@ -215,11 +215,6 @@ public final class BlockGuard {
             return mFileSystem.seek(fileDescriptor, offset, whence);
         }
 
-        public void fsync(int fileDescriptor, boolean metadata) throws IOException {
-            BlockGuard.getThreadPolicy().onWriteToDisk();
-            mFileSystem.fsync(fileDescriptor, metadata);
-        }
-
         public void truncate(int fileDescriptor, long size) throws IOException {
             BlockGuard.getThreadPolicy().onWriteToDisk();
             mFileSystem.truncate(fileDescriptor, size);