Merge "libbinder_ndk: support for nullable parcelables" am: 56ef5878bf am: 9609d97553 am: 075c04acbb
Change-Id: I8b4e462d38b68605942ed8543c3f18bd99713ed6
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h b/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
index 2ef97a3..df5df13 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
@@ -449,6 +449,41 @@
}
/**
+ * Convenience API for writing a nullable parcelable.
+ */
+template <typename P>
+static inline binder_status_t AParcel_writeNullableParcelable(AParcel* parcel,
+ const std::optional<P>& p) {
+ if (p == std::nullopt) {
+ return AParcel_writeInt32(parcel, 0); // null
+ }
+ binder_status_t status = AParcel_writeInt32(parcel, 1); // non-null
+ if (status != STATUS_OK) {
+ return status;
+ }
+ return p->writeToParcel(parcel);
+}
+
+/**
+ * Convenience API for reading a nullable parcelable.
+ */
+template <typename P>
+static inline binder_status_t AParcel_readNullableParcelable(const AParcel* parcel,
+ std::optional<P>* p) {
+ int32_t null;
+ binder_status_t status = AParcel_readInt32(parcel, &null);
+ if (status != STATUS_OK) {
+ return status;
+ }
+ if (null == 0) {
+ *p = std::nullopt;
+ return STATUS_OK;
+ }
+ *p = std::optional<P>(P{});
+ return (*p)->readFromParcel(parcel);
+}
+
+/**
* Writes a parcelable object of type P inside a std::vector<P> at index 'index' to 'parcel'.
*/
template <typename P>