Commit graph

2366 commits

Author SHA1 Message Date
Jeff Brown
4ccb2fc8e1 Refactor input reader to add stylus support.
Bug: 5064702

Introduced the concept of an InputListener to further decouple
the InputReader from the InputDispatcher.  The InputListener
exposes just the minimum interface that the InputReader needs
to communicate with the outside world.  The InputReader
passes arguments to the InputListener by reference, which makes
it easy to queue them up.

Consolidated all of the InputReader locks into one simple global
Mutex.  The reason this wasn't done before was due to potential
re-entrance in outbound calls to the InputDispatcher.  To fix this,
the InputReader now queues up all of the events it wants to send
using a QueuedInputListener, then flushes them outside of the
critical section after all of the event processing is finished.
Removing all of the InputMapper locks greatly simplifies the
implementation.

Added tests for new stylus features such as buttons, tool types,
and hovering.

Added some helpers to BitSet32 to handle common code patterns
like finding the first marked bit and clearing it.

Fixed a bug in VelocityTracker where the wrong pointer trace
could get cleared when handling ACTION_POINTER_DOWN.  Oops.

Changed PointerCoords so it no longer stores useless zero
axis values.  Removed editAxisValue because it is not very
useful when all zero value axes are absent and therefore
cannot be edited in place.

Added dispatch of stylus hover events.

Added support for distance and tool types.

Change-Id: I4cf14d134fcb1db7d10be5f2af7b37deef8f8468
2013-07-30 13:56:57 -07:00
Kenny Root
88761b2796 Move extract native libraries to JNI code
The built-in ZipFile class was quite a long time to find an unpack
libraries. Move everything to using the libutils ZipFileRO class that
goes quite a bit faster. Initial measurements are 6 times faster than
the Java code.

Also, read files off the disk and compare their CRC against the APK's
CRC to see if we need to write the new file to disk. This also cuts down
the bootup time by up to a second per APK that has native files.

Change-Id: Ic464a7969a17368fb6a6b81d026888c4136c7603
2013-07-30 13:56:57 -07:00
Jeff Brown
7e01e60e5e Remove unimplemented memory pool.
dlmalloc does such a great job that we don't need a pool anyways.

Change-Id: I105b28c4a5c491543959190c7c0a9de75a5b8052
2013-07-30 13:56:57 -07:00
Glenn Kasten
6fbe0a86a8 Add C++ thread API androidGetThreadSchedulingGroup
This API is intended for applications that need to read a thread's
scheduling group, while using the higher-level (C++) family of thread APIs.

Change-Id: I5e58017f74c3989b20b5b1cc2bc4483c95720520
2013-07-30 13:56:57 -07:00
Jeff Brown
82e14f6780 Workaround apps that make assumptions about pointer ids.
Modified the touch input mapper to assign pointer ids sequentially
starting from 0 instead of using the tracking id or slot index
supplied by the driver.  Applications should not depend on this
ordering but some do.  (sigh)

Bug: 4980884
Change-Id: I0dfeb3ac27c57a7102a13c960c760e2a02eb7669
2013-07-30 13:56:57 -07:00
Mathias Agopian
320a2b4103 SF transactions are now O(1) wrt IPC instead of O(N).
Change-Id: I57669852cbf6aabae244ea86940a08a5a27ffc43
2013-07-30 13:56:57 -07:00
Jason Simmons
b86c8e4e55 Add a linear transform library to libutils
Change-Id: Icdec5a6bebd9d8f24b3f335f8ec8b09a5810a774
2013-07-30 13:56:57 -07:00
Glenn Kasten
6839e8e9ee Add Thread::join
This new API will be used by applications that previously used the
lower-level pthread APIs (including pthread_join).  Centralizing on the
Thread class instead of pthread will permit additional functionality to
be added later in only one location.

Change-Id: I8460169ac9c61ac9f85752405ed54c94651058d7
2013-07-30 13:56:57 -07:00
Glenn Kasten
5e0243f4d6 Thread ID zero for androidSetThreadSchedulingGroup
Already implemented by androidSetThreadPriority but not documented

Change-Id: I85302b17092952065f3f3a4214d8d8abdd465dbd
2013-07-30 13:56:57 -07:00
Mathias Agopian
7f57eac6a7 Revert "merge various SF fixes from gingerbread to honeycomb-mr2" (DO NOT MERGE)
Also revert all dependent changes:
This reverts commit 8e18668d14adf601cbe5973030c310ec23d88461.
This reverts commit 69b4587bfbb3e98f793959d9123340360fa233a2.
This reverts commit a9c9a4baf24700e8817d47d8ea8da1742caea0b5.
This reverts commit 2c0042b666a969091c931614f2fc0dce2f1cfac8.
This reverts commit f6c8206735e7e078461e5f2aef6e1a1446fdd075.
This reverts commit 24855c09173a6caaec7dcedd0c2d7ce15121d39b.

Change-Id: I33e699640f3f59e42fa03c99a9a1b7af0d27d4d8
2013-07-30 13:56:57 -07:00
Kenny Root
967ad860da Use rand() for MinGW
The version of MinGW we use doesn't have nrand48() which is really lame,
but we need to use libutils in the Windows SDK.

Change-Id: If854c03dbf02bc29e79f49e4539f08c2bf057517
2013-07-30 13:56:57 -07:00
Mathias Agopian
9c8fa9ed41 revert surfaceflinger leak fix as it uncovered a crasher on xoom (DO NOT MERGE)
This reverts commit 52a43990880b27808bcf562afcc4209d34728e6e.

Change-Id: I1856a48f863b051395b8091ddfd1e01292fa1b1e
2013-07-30 13:56:57 -07:00
Mathias Agopian
267ba69c2e Revert "revert surfaceflinger leak fix as it uncovered a crasher on xoom"
This reverts commit af6edba59e250adbdfa5b3c3be134f70d8c38a16.

Change-Id: I7793d3ca8a4d20a2b188364f47854328ab5f586d
2013-07-30 13:56:57 -07:00
Mathias Agopian
dace0b45d0 revert surfaceflinger leak fix as it uncovered a crasher on xoom
Bug: 4600244
Change-Id: Ia68ebf0f243a051ff6a21b3863e3e5d259bbf7ac
2013-07-30 13:56:57 -07:00
Mathias Agopian
0151ac8945 may fix build on some version of gcc
Change-Id: Ia88787c0432ec84d51fe505fd6a2b6f98ebe8f33
2013-07-30 13:56:57 -07:00
Mathias Agopian
9b6259aa57 fix RefBase so it retains binary-compatibility with gingerbread (DO NOT MERGE)
Bug: 4595257
Change-Id: I1db83149107d7dab1f0b7e73c684e0ff82e17e62
2013-07-30 13:56:57 -07:00
Glenn Kasten
a538e268e6 Remove redundant memory barrier
pthread_create already includes the necessary memory barriers:
 - parent at pthread_create : pthread_mutex_unlock(start_mutex)
 - child at __thread_entry : pthread_mutex_lock(start_mutex)

Add lock around uses of mThread.

Added comments:
 - uses of mThread require lock
 - androidCreateRawThreadEtc returned ID is not safe for direct use from non-parent threads.

Change-Id: I18cb296b41ddaf64cf127b57aab31154319b5970
2013-07-30 13:56:57 -07:00
Dianne Hackborn
bf7a884f22 Enforce public resource restriction on bag parents.
Need to put some more styles in the SDK to avoid breaking apps.

Also, welcome Android 3.2.

Change-Id: Ia31d07c9b1b91ad868d8630437fdc1b5ae24f37d
2013-07-30 13:56:56 -07:00
Dianne Hackborn
2d57c03872 Add "tv" density for 720p screens.
Change-Id: I028969b007f2fceea66947d77a2ae31ef1d1a630
2013-07-30 13:56:56 -07:00
Dianne Hackborn
4a8bf7977e Small fixes and cleanup of resource config handling.
Change-Id: I402c31b68f2b4825cb4c610a65ee8e1da471c7bb
2013-07-30 13:56:56 -07:00
Dianne Hackborn
19797e22ac Add "television" mode.
Change-Id: Ida1fdb61b036a8b489dbeda196fb4bc82e651b2b
2013-07-30 13:56:56 -07:00
Mathias Agopian
d781137601 RefBase subclasses can now decide how they want to be destroyed.
This adds a destroy() virtual on RefBase which
sublasses can implement. destroy() is called
in lieu of the destructor whenthe last strong
ref goes away.
2013-07-30 13:56:56 -07:00
Dianne Hackborn
23138b63df Add new "-swNNNdp" resource qualifier.
Change-Id: I0101e88ca9d8d44138bdcaf571f24b0352f4f6ce
2013-07-30 13:56:56 -07:00
Jamie Gennis
1a20993c10 libutils: add a binary blob cache implementation.
This change adds an implementation of a cache that stores key/value
pairs of unstructured binary blobs.

Change-Id: Idd01fdabedfa3aed6d359a6efb0592967af52651
2013-07-30 13:56:56 -07:00
Christopher Tate
424ec5a8aa Full local backup infrastructure
This is the basic infrastructure for pulling a full(*) backup of the
device's data over an adb(**) connection to the local device.  The
basic process consists of these interacting pieces:

1. The framework's BackupManagerService, which coordinates the
   collection of app data and routing to the destination.

2. A new framework-provided BackupAgent implementation called
   FullBackupAgent, which is instantiated in the target applications'
   processes in turn, and knows how to emit a datastream that contains
   all of the app's saved data files.

3. A new shell-level program called "bu" that is used to bridge from
   adb to the framework's Backup Manager.

4. adb itself, which now knows how to use 'bu' to kick off a backup
   operation and pull the resulting data stream to the desktop host.

5. A system-provided application that verifies with the user that
   an attempted backup/restore operation is in fact expected and to
   be allowed.

The full agent implementation is not used during normal operation of
the delta-based app-customized remote backup process.  Instead it's
used during user-confirmed *full* backup of applications and all their
data to a local destination, e.g. via the adb connection.

The output format is 'tar'.  This makes it very easy for the end
user to examine the resulting dataset, e.g. for purpose of extracting
files for debug purposes; as well as making it easy to contemplate
adding things like a direct gzip stage to the data pipeline during
backup/restore.  It also makes it convenient to construct and maintain
synthetic backup datasets for testing purposes.

Within the tar format, certain artificial conventions are used.
All files are stored within top-level directories according to
their semantic origin:

apps/pkgname/a/  : Application .apk file itself
apps/pkgname/obb/: The application's associated .obb containers
apps/pkgname/f/  : The subtree rooted at the getFilesDir() location
apps/pkgname/db/ : The subtree rooted at the getDatabasePath() parent
apps/pkgname/sp/ : The subtree rooted at the getSharedPrefsFile() parent
apps/pkgname/r/  : Files stored relative to the root of the app's file tree
apps/pkgname/c/  : Reserved for the app's getCacheDir() tree; not stored.

For each package, the first entry in the tar stream is a file called
"_manifest", nominally rooted at apps/pkgname.  This file contains some
metadata about the package whose data is stored in the archive.

The contents of shared storage can optionally be included in the tar
stream. It is placed in the synthetic location:

shared/...

uid/gid are ignored; app uids are assigned at install time, and the
app's data is handled from within its own execution environment, so
will automatically have the app's correct uid.

Forward-locked .apk files are never backed up.  System-partition
.apk files are not backed up unless they have been overridden by a
post-factory upgrade, in which case the current .apk *is* backed up --
i.e. the .apk that matches the on-disk data.  The manifest preceding
each application's portion of the tar stream provides version numbers
and signature blocks for version checking, as well as an indication
of whether the restore logic should expect to install the .apk before
extracting the data.

System packages can designate their own full backup agents.  This is
to manage things like the settings provider which (a) cannot be shut
down on the fly in order to do a clean snapshot of their file trees,
and (b) manage data that is not only irrelevant but actively hostile
to non-identical devices -- CDMA telephony settings would seriously
mess up a GSM device if emplaced there blind, for example.

When a full backup or restore is initiated from adb, the system will
present a confirmation UI that the user must explicitly respond to
within a short [~ 30 seconds] timeout.  This is to avoid the
possibility of malicious desktop-side software secretly grabbing a copy
of all the user's data for nefarious purposes.

(*) The backup is not strictly a full mirror.  In particular, the
    settings database is not cloned; it is handled the same way that
    it is in cloud backup/restore.  This is because some settings
    are actively destructive if cloned onto a different (or
    especially a different-model) device: telephony settings and
    AndroidID are good examples of this.

(**) On the framework side it doesn't care that it's adb; it just
    sends the tar stream to a file descriptor.  This can easily be
    retargeted around whatever transport we might decide to use
    in the future.

KNOWN ISSUES:

* the security UI is desperately ugly; no proper designs have yet
  been done for it
* restore is not yet implemented
* shared storage backup is not yet implemented
* symlinks aren't yet handled, though some infrastructure for
  dealing with them has been put in place.

Change-Id: Ia8347611e23b398af36ea22c36dff0a276b1ce91
2013-07-30 13:56:56 -07:00
Mathias Agopian
58dc2c8101 fix typo in Vector<>:: push_back and push_front
parameter were inverted.

Change-Id: I867b01de5f58354bb9668fa662dd2a7d78dd3b37
2013-07-30 13:56:56 -07:00
Mathias Agopian
bc55d727f3 Add some basic STL compatibility to Vector<>
Change-Id: Iaf72623170ee415372c7989d7ba9ff627167449e
2013-07-30 13:56:56 -07:00
Dianne Hackborn
aa3a2c5613 Add new resource configurations for screen width/height in "dp".
You can now specify resource configuration variants "wNNNdp"
and "hNNNdp".  These are the minimum screen width/height in "dp"
units.  This allows you to do things like have your app adjust
its layout based only on the about of horizontal space available.

This introduces a new configuration change flag for screen size.
Note that this configuration change happens each time the orientation
changes.  Applications often say they handle the orientation change
to avoid being restarted at a screen rotation, and this will now
cause them to be restarted.  To address this, we assume the app can
handle this new config change if its target SDK version is < ICS.

Change-Id: I22f8afa136b4f274423978c570fa7c9855040496
2013-07-30 13:56:56 -07:00
Mårten Kongstad
3145b38462 Runtime resource overlay, iteration 1.
Runtime resource overlay allows unmodified applications to appear
as if they had been compiled with additional resources defined. See
libs/utils/README for more information.

This commit is the first iteration of runtime resource overlay. It
provides the actual overlay modifications and loading of trusted overlay
packages (ie residing in /vendor) targeting framework-res.apk.

This commit loads exactly one overlay package. The overlay,
if present, must target framework-res.apk and be located at
/vendor/overlay/framework/framework-res.apk.

Change-Id: If26ee7754813004a96c043dba37fbe99fa3919db
2013-07-30 13:56:56 -07:00
Jeff Brown
43550eee5b Refactor how timeouts are calculated.
Added a timeout mechanism to EventHub and InputReader so that
InputMappers can request timeouts to perform delayed processing of
input when needed.

Change-Id: Iec2045baaf4e67690b15eef3c09a58d5cac76897
2013-07-30 13:56:56 -07:00
Mathias Agopian
7c123375ff fix [4093196] Device lock up - log spam with SharedBufferStack: waitForCondition(LockCondition) timed out
a memory corruption happned when the buffer pool was resized
(like when playing a video or using camera) and there was
no current active buffer. In this case, the faulty code
would index into an array at position -1 which corrupted
24 bytes of data.

also improved region validation code (ifdef'ed out by default)

Bug: 4093196
Change-Id: I915c581d131148959d720e00e3892e9186ab733d
2013-07-30 13:56:56 -07:00
Romain Guy
349626eb76 Modify the GL renderer's functor to pass the clip to WebView
Change-Id: If5efe399ca58f3000b2883e24e9f3736a2025184
2013-07-30 13:56:56 -07:00
Jeff Brown
5e35370a3b Improve VelocityTracker numerical stability.
Replaced VelocityTracker with a faster and more accurate
native implementation.  This avoids the duplicate maintenance
overhead of having two implementations.

The new algorithm requires that the sample duration be at least
10ms in order to contribute to the velocity calculation.  This
ensures that the velocity is not severely overestimated when
samples arrive in bursts.

The new algorithm computes the exponentially weighted moving
average using weights based on the relative duration of successive
sample periods.

The new algorithm is also more careful about how it handles
individual pointers going down or up and their effects on the
collected movement traces.  The intent is to preserve the last
known velocity of pointers as they go up while also ensuring
that other motion samples do not count twice in that case.

Bug: 4086785
Change-Id: I2632321232c64d6b8faacdb929e33f60e64dcdd3
2013-07-30 13:56:56 -07:00
Glenn Kasten
29d4d20c24 Bug 4016329 do full string comparisons
Use full string comparisons instead of partial for
  file extension and MIME type.
Do case-insensitive comparison of MIME type and file extensions.
Fix error in comment for String8::getPathExtension.
Remove dead code -- StringTokenizer is unused.

Change-Id: I322be6235abbdaab5f7eafa48926dbb2cf46dc29
2013-07-30 13:56:56 -07:00
Jeff Brown
9ae794de46 Use touch pad gestures to manipulate the pointer.
1. Single finger tap performs a click.
2. Single finger movement moves the pointer (hovers).
3. Button press plus movement performs click or drag.
   While dragging, the pointer follows the finger that is moving
   fastest.  This is important if there are additional fingers
   down on the touch pad for the purpose of applying force
   to an integrated button underneath.
4. Two fingers near each other moving in the same direction
   are coalesced as a swipe gesture under the pointer.
5. Two or more fingers moving in arbitrary directions are
   transformed into touches in the vicinity of the pointer.
   This makes scale/zoom and rotate gestures possible.

Added a native VelocityTracker implementation to enable intelligent
switching of the active pointer during drags.

Change-Id: I5ada57e7f2bdb9b0a791843eb354a8c706b365dc
2013-07-30 13:56:56 -07:00
Romain Guy
b6e92ae9a1 Add support for partial invalidates in WebView
Bug #3461349

This change also fixes two bugs that prevented partial invalidates
from working with other views. Both bugs were in our EGL implementation:
they were preventing the caller from comparing the current context/surface
with another context/surface. This was causing HardwareRenderer to always
redraw the entire screen.

Change-Id: I33e096b304d4a0b7e6c8f92930f71d2ece9bebf5
2013-07-30 13:56:56 -07:00
Jeff Brown
3e2e38bc5b Fade out the mouse pointer after inactivity or other events.
Fades out the mouse pointer:
- after 15 seconds of inactivity normally
- after 3 seconds of inactivity in lights out mode
- after a non-modifier key down
- after a touch down

Extended the native Looper to support enqueuing time delayed
messages.  This is used by the PointerController to control
pointer fade timing.

Change-Id: I87792fea7dbe2d9376c78cf354fe3189a484d9da
2013-07-30 13:56:56 -07:00
Fabrice Di Meglio
5a14f4a721 Add TextLayout Cache
- use GenerationCache for caching
- move GenerationCache.h from libs/hwui/utils to include/utils
- add #define for cache activation / deactivation

Change-Id: Ifaf519f0b5e33b087a453e4aa6430162d8438f20
2013-07-30 13:56:56 -07:00
Mathias Agopian
7332f80db5 Fix sp<> conversion operator / constructor
some of the conversion operators were not using the proper
pointer type when calling incStrong/decStrong, usually it
has no bad consequences, but for some implementation
of the ref-counted object it could lead to recording the wrong
owner id.

Change-Id: If574b9069b8a4cf6e0911a992c8f095aba799995
2013-07-30 13:56:56 -07:00
Mathias Agopian
3e0f87541f Fix a wp<> bug where the owner ID would be wrong
this was introduced recently. we make sure to use
the correct owner id (the sp) instead of the wp.

Change-Id: I78fdc6ec0c2d3e687278b70442d74d1924b512a2
2013-07-30 13:56:56 -07:00
Mathias Agopian
b26ea8b30f Fix some issues with RefBase debugging.
First slipt sp<> out of RefBase into StrongPointer.h so it can be reused
more easily and to make it clear that it doesn't require RefBase.

Note: the rest of the change only affects the system when DEBUG_REFS is enabled.

The main problem we fix here is that the owner id associated with each
reference could get out of date when a sp<> or wp<> was moved, for
instance when they're used in a Vector< >.

We fix this issue by calling into RefBase::moveReferences from
a template specialization for sp<TYPE> and wp<TYPE> of the
type helpers. RefBase::moveReferences() has then a chance to
update the owner ids.

There is a little bit of trickery to implement this generically in
RefBase, where we need to use a templatized functor that can turn
a sp<TYPE>* casted to a void* into a RefBase*.

Introduced a new debug option DEBUG_REFS_FATAL_SANITY_CHECKS
currently set to 0 by default as there seem to be an issue
with sp<ANativeWindow> which trips the sanity checks.

Change-Id: I4825b21c8ec47d4a0ef35d760760ae0c9cdfbd7f
2013-07-30 13:56:56 -07:00
Glenn Kasten
966a48f3e7 Bug 3362814 Fix SMP race in access to mRequestExit
Also fix an unlikely SMP race in access to mHoldSelf on entry to _threadLoop.

Change-Id: I6cbc0b94739c7dd5e77e8a5ba0da22cdc0b1a4db
2013-07-30 13:56:55 -07:00
Mathias Agopian
84a23fa4a9 Remove RefBase.h dependency on TextOutput.h
Change-Id: I72cd6b98ef82b4868fe1c8ec87862cf43fb4ee73
2013-07-30 13:56:55 -07:00
Mathias Agopian
ff49de731f fix [3408713] Dialog window invisible sometimes
weak pointer comparison operators were implemented wrong,
they were using the internal "unsafe" pointer. We could end up
with two "equal" weak pointer pointing to different objects.

this caused KeyedVector keyed by weak pointer to work incorrectly, in
turn causing a window that just got added to a list to be immediately
removed.

Change-Id: Ib191010c39aafa9229109e4211f6c3b2b2f9696d
2013-07-30 13:56:55 -07:00
Chet Haase
b90c51a725 Use optimized display lists for all hwaccelerated rendering
Previously, display lists were used only if hardware acceleration
was enabled for an application (hardwareAccelerated=true) *and* if
setDrawingCacheEnabled(true) was called. This change makes the framework
use display lists for all views in an application if hardware acceleration
is enabled.

In addition, display list renderering has been optimized so that
any view's recreation of its own display list (which is necessary whenever
the visuals of that view change) will not cause any other display list
in its parent hierarchy to change. Instead, when there are any visual
changes in the hierarchy, only those views which need to have new
display list content will recreate their display lists.

This optimization works by caching display list references in each
parent display list (so the container of some child will refer to its
child's display list by a reference to the child's display list). Then when
a view needs to recreate its display list, it will do so inside the same
display list object. This will cause the content to get refreshed, but not
the reference to that content. Then when the view hierarchy is redrawn,
it will automatically pick up the new content from the old reference.

This optimization will not necessarily improve performance when applications
need to update the entire view hierarchy or redraw the entire screen, but it does
show significant improvements when redrawing only a portion of the screen,
especially when the regions that are not refreshed are complex and time-
consuming to redraw.

Change-Id: I68d21cac6a224a05703070ec85253220cb001eb4
2013-07-30 13:56:55 -07:00
Shachar Shemesh
b69f49bab9 Normalize output from aapt d
Make the output from aapt dump --values resources and aapt dump xmltree normalized, so that it is unambigously displayed
regardless of the content of the strings.

Change-Id: Ia3bff36c4ee1e9a44f474534e154830948beabdf
2013-07-30 13:56:55 -07:00
Jeff Brown
8659f0be9a Add initial support for cursor-based pointing devices.
Some parts stubbed out but you can plug in a mouse and move
a green cursor around to interact with the UI.

Change-Id: I80d597a7f11d3bd92041890f74b3c77326975e6e
2013-07-30 13:56:55 -07:00
Mathias Agopian
c974d4dbe0 dump callstack on Surface use error
Change-Id: I38e260dd47349b9af3a999dda683a083a94be16d
2013-07-30 13:56:55 -07:00
Kenny Root
e2fa7dc58e Change assets to use 64-bit API
The asset system and supporting libraries were using off_t instead of
off64_t to access files larger than 2GB (32-bit signed). This change
replaces all off_t with off64_t and lseek64.

There is a new utils/Compat.h added for Mac OS compatibility.

Also fixed some size-related compiler warnings.

Bug: 3205336
Change-Id: I9097b3cb7a602e811fe52f245939d8975da55e9e
2013-07-30 13:56:55 -07:00
Jeff Brown
1d618d63c1 Improve support for external keyboards.
Use Vendor ID, Product ID and optionally the Version to
locate keymaps and configuration files for external devices.

Moved virtual key definition parsing to native code so that
EventHub can identify touch screens with virtual keys and load
the appropriate key layout file.

Cleaned up a lot of old code in EventHub.

Fixed a regression in ViewRoot's fallback event handling.

Fixed a minor bug in FileMap that caused it to try to munmap
or close invalid handled when released if the attempt to map
the file failed.

Added a couple of new String8 conveniences for formatting strings.

Modified Tokenizer to fall back to open+read when mmap fails since
we can't mmap sysfs files as needed to open the virtual key
definition files in /sys/board_properties/.

Change-Id: I6ca5e5f9547619fd082ddac47e87ce185da69ee6
2013-07-30 13:56:55 -07:00