Add an “is valid” query to ANativeWindow
This will help avoid certain crash (null dereference),
and return an error instead. This is useful for
app developers as java language apps are not
expected to crash when passed bad arguments
This doesn’t fix bug 36065206, but was prompted
by it.
Test: compile / run
Bug: 36065206
Change-Id: I329874821f5cd780eeaacf8945859af5ab790cf4
diff --git a/include/system/window.h b/include/system/window.h
index 8149ca5..31a239b 100644
--- a/include/system/window.h
+++ b/include/system/window.h
@@ -317,6 +317,12 @@
* retire info, 0 if it won't.
*/
NATIVE_WINDOW_FRAME_TIMESTAMPS_SUPPORTS_RETIRE = 18,
+
+ /*
+ * Returns 1 if the native window is valid, 0 otherwise. native window is valid
+ * if it is safe (i.e. no crash will occur) to call any method on it.
+ */
+ NATIVE_WINDOW_IS_VALID = 19,
};
/* Valid operations for the (*perform)() hook.