Alien is a library for type safe direct memory access using structures introduced in JDK 22 Foreign Function & Memory API.

Region.fresh.shared { implicit region =>
  val layout = ("a" := Values.Long) >>:
               ("seq" := Values.Long * 123) >>:
               ("b" := Values.Char)
  val ptr = layout / "seq" / % / $
  val memory = Memory.allocate(layout)
  ptr.set(memory, 0, 42)
}

Add alien as a dependency to your build.sbt:

libraryDependencies += "com.yandex.classifieds" %% "alien-memory" % "0.1.0"

Alien can be used with

• Scala 2.13
• Java 21 or Java 22

At the time of the release of Java 21, the Foreign Function & Memory API was in the preview stage, so it is recommended to use Java 22 with a final version of FFM.

More detailed docs can be found here.