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David Aurelio 5f31a1082b Support !-style fast calls for Android

Summary:
Adds support for `!`-style fast calls in Android versions < 8.

For now, this comes with the following restrictions:

- has to be enabled with a macro
- only supports native functions that return and accept primitive Java types (`jint`, `jdouble`, etc.), and `void`
- this is supposed to map to `CriticalNative` as described in https://source.android.com/devices/tech/dalvik/improvements#faster-native-methods.

Inline documentation in art: http://androidxref.com/6.0.1_r10/xref/art/runtime/jni_internal.cc#2110

Possible follow ups:
- don’t prefix when the Android runtime is too new (to avoid the warning, and future error, see http://androidxref.com/8.1.0_r33/xref/art/runtime/jni_internal.cc#2355)
- shim `CriticalNative` (see https://android.googlesource.com/platform/libcore/+/master/dalvik/src/main/java/dalvik/annotation/optimization/CriticalNative.java)
- test whether we can use `CriticalNative` at all (docs claim classes must be on bootclasspath)
- suppport `FastNative`, i.e. instance methods that can also receive and return `jobject`

Reviewed By: cjhopman

Differential Revision: D9630538

fbshipit-source-id: 0ae86c909b192429d60f8eddb15528cc38610379

2018-09-19 17:32:46 -07:00

libs

Bump Android Support Library to 27.1.1 (#20586 )

2018-08-20 18:08:52 -07:00

src

Support !-style fast calls for Android

2018-09-19 17:32:46 -07:00

.npmignore

Don't publish /ReactAndroid/build to npm, update version on master

2015-10-12 11:11:40 -07:00

build.gradle

Downgrade to compileSdkVersion 26