unmanagedMemory.java

import org.graalvm.nativeimage.c.struct.SizeOf;
import static org.graalvm.nativeimage.UnmanagedMemory.calloc;
import static org.graalvm.nativeimage.UnmanagedMemory.malloc;
public static CSpeechBusinessData allocData() {
    // malloc() initializes only. allocated space is dirty.
    CSpeechBusinessData csbd = malloc(
        SizeOf.get(CSpeechBusinessData.class)
    );
    
    return csbd;
}

// allocate an array of *
public static WordPointer allocArray(int size) {
    // calloc() initializes and sanitizes
    return calloc(size * SizeOf.get(WordPointer.class));
}