This change fixes race conditions that occur very regularly when
content providers are accessed from multiple threads at the same
time.
When a content provider is not already in the application's cache,
the application needs to ask the ActivityManager to obtain it.
Meanwhile, another thread can come along and do the same thing.
This can cause problems because the application attempts to
install two copies of the provider and the reference counts
and other bookkeeping can get muddled.
Similarly, there are races between releasing the last reference
to a content provider and acquiring the content provider. It's
possible for one thread to snatch the content provider from the
jaws of death. We need to handle this explicitly to ensure that
the content provider does not accidentally get released right
after it was acquired by the other thread.
This change ensures that the reference count bookkeeping and
provider map are maintained in parallel while holding the same lock.
Previously because the lock was dropped and reacquired in the
middle of acquisition and removal, it was possible for a
content provider with a zero reference count to be returned
to the application. Likewise, it was possible for a content
provider with a non-zero reference count to be disposed!
This change also performs compensatory actions when races are
detected to ensure that the necessary invariants are maintained
throughout. In particular, it ensures that the application
drops a duplicate reference to a content provider when no
longer needed.
Another way to solve this problem would be to explicitly prevent
the races from happening in the first place by maintaining a
table of content providers that are in the process of being
acquired. The first thread to attempt to acquire the provider
would store a record. The next thread would find the record
and block until the first thread was finished. I chose not
to implement the code in that manner because we would still
have needed to perform compensatory actions in the case where
the same provider binder has multiple logical names. Also,
it could cause deadlocks if the attempt to acquire
a content provider were re-entrant for some bizarre reason.
Bug: 5547357
Change-Id: I2ad39a8acc30aaf7ae5354decd0a0a41e9b9c3da
...LoadedApk.ServiceDispatcher.connected , LoadedApk.forgetServiceDispatcher
Don't be stupid if we receive a new binding to a ServiceConnection after it
has already been unbound.
Change-Id: I85a49de97372bf9af55542a89031f0b7a2ac8fbb
-> On the Xoom, this change gets us back up to 60 fps. The
change is really more of a workaround for the fact that we don't
have vsync, and we ought to be able to change it back once we do.
Change-Id: I80888f18887bf5f2fed72c19641ed430ef6dbfcf
We are tagging these as "watchdog" to make them visible in the
reporting tools.
Also new am command to kill all background processes, mostly to make
it easier to test this stuff.
Change-Id: Ib9dc4747cd8bd44156fdf11d6a087cd4272203eb
Allow a fragment to set a hint of whether or not it is currently user
visible. This will be used implicitly to defer the start of fragments
that are not user visible until the loaders for visible fragments have
run. This hint defaults to true.
Change-Id: Id1349d319886a277ef07301f64f7b9e12c8729bf
stopped if "defer start" is enabled
Only revise the target state in moveToState if it would cross the
stopped/started boundary.
Change-Id: I8f6e400331157eac9343261117cf633611fc1e4d
manager
Remove extra queued dialog dismiss messages when applicable. Log an
error if the app tries to dismiss a dialog when its window has been
destroyed.
Change-Id: Ice8383d4420c052e31fbbd9fcd25051f3bd9b58d
- Don't try to create a thumbnail bitmap on the client side. This
wastes 64k, and isn't needed since we are doing screenshots.
- Optimize View to put all of the callback pointers out of line.
Added a couple new APIs so these don't need to be protected/public.
- Lazily create ViewGroup's cache paint.
- Change FrameworkPerf app to not use HW accel drawing, to give better
comparison with GB.
Change-Id: Iec56d02459820d74a4cc9c7ec9c1856563c82c7b
* commit '2eca6133b69db0a649b8429dcef4ed46b209bf41':
Fix bug 5528574 - "View not attached to window manager" upon orientation change when there is a dialog with ActionMode on
orientation change when there is a dialog with ActionMode on
Fix a bug closing down active action modes as dialogs are closing.
Change-Id: I0d28e3b3845d5ed50fbb55b180dafa1b11957b81
SerialManager: provides access to serial ports
SerialPort: for reading and writing data to and from serial ports
IO with both array based and direct ByteBuffers is supported.
Accessing serial ports requires android.permission.SERIAL_PORT permission
Each platform must configure list of supported serial ports in the
config_serialPorts resource overlay
(this is needed to prevent apps from accidentally accessing the bluetooth
or other system UARTs).
In addition, the platform uevent.rc file must set the owner to the
/dev/tty* files to "system" so the framework can access the port.
Change-Id: I8d75ca7d6592223ea6c47f8a17fa180dfed1aad0
Signed-off-by: Mike Lockwood <lockwood@android.com>
Fragments now have the setDeferStart method to signal that a fragment
has lower priority than others. Deferred start fragments will not
always be started immediately; they will be started once any loaders
have finished servicing any outstanding requests. This is useful if
any attached fragments are not immediately visible and can wait to
start until later.
Disabling deferStart on a fragment that is waiting for a deferred
start will start it immediately. Start.
Change-Id: Ia1f004877ca5e88d4f10147d21c7e2e97f141c34
This fixes a bug where the clock wasn't being shown in the statusbar while
the music widget is showing.
Change-Id: Ic1c52c4ab7fa1490fe14ddafaf2c494bcf51866d
This is to allow the launcher to include the source bounds of the
search affordance on the homescreen when launching the global
search app.
Bug: 5235747
Change-Id: I7af1a651d593b6d946aa2fe42d900a9c4470b4e2
Additionally, start using setSystemUiVisibility() where
possible in the keyguard to allow activities and dialogs to
re-enable some of the navigation keys (notably: home but not
recents).
Finally, stop disabling MENU for activities atop the keyguard.
Bug: 5380495 // no home in driveabout, clock
Bug: 5396134 // able to show home/recent in keyguard
Change-Id: I04eb224554ee8cff79476b85148c4cda75bb0b62
...the "Complete action using" dialog
When an application goes idle, it sends back to the activity manager
the configuration it last used, to make sure the two don't get out
of sync. Fix a bunch of edge cases here in dealing with that, and
be sure to also send the current configuration when launching an
activity so the client is always up-to-date when launching.
Also a small fix to not show the upgrading dialog during first boot.
Change-Id: I14ed366a87cd689d1c78787369e052422290ac6f
