1 files changed, 40 insertions, 0 deletions
diff --git a/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/ObjectCleanerHelper.kt b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/ObjectCleanerHelper.kt
new file mode 100644
index 0000000000..e3e85544d7
--- /dev/null
+++ b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/ObjectCleanerHelper.kt
@@ -0,0 +1,40 @@
+
+// The cleaner interface for Object finalization code to run.
+// This is the entry point to any implementation that we're using.
+//
+// The cleaner registers objects and returns cleanables, so now we are
+// defining a `UniffiCleaner` with a `UniffiClenaer.Cleanable` to abstract the
+// different implmentations available at compile time.
+interface UniffiCleaner {
+    interface Cleanable {
+        fun clean()
+    }
+
+    fun register(value: Any, cleanUpTask: Runnable): UniffiCleaner.Cleanable
+
+    companion object
+}
+
+// The fallback Jna cleaner, which is available for both Android, and the JVM.
+private class UniffiJnaCleaner : UniffiCleaner {
+    private val cleaner = com.sun.jna.internal.Cleaner.getCleaner()
+
+    override fun register(value: Any, cleanUpTask: Runnable): UniffiCleaner.Cleanable =
+        UniffiJnaCleanable(cleaner.register(value, cleanUpTask))
+}
+
+private class UniffiJnaCleanable(
+    private val cleanable: com.sun.jna.internal.Cleaner.Cleanable,
+) : UniffiCleaner.Cleanable {
+    override fun clean() = cleanable.clean()
+}
+
+// We decide at uniffi binding generation time whether we were
+// using Android or not.
+// There are further runtime checks to chose the correct implementation
+// of the cleaner.
+{% if config.android_cleaner() %}
+{%-   include "ObjectCleanerHelperAndroid.kt" %}
+{%- else %}
+{%-   include "ObjectCleanerHelperJvm.kt" %}
+{%- endif %}