private static NativeCalls getImplInstance() {
    if (Platform.isLinux()) {
      return new LinuxNativeCalls();
    }
    if (Platform.isWindows()) {
      return new WinNativeCalls();
    }
    return new POSIXNativeCalls();
  }
The static instance of the JNA based implementation for this platform.
geode-core/src/main/java/org/apache/geode/internal/shared/NativeCallsJNAImpl.java