First implementation of nqp::buildnativecall.

Author: arnsholt

src/vm/jvm/runtime/org/perl6/nqp/runtime/NativeCallOps.java

@@ -1,7 +1,11 @@
 package org.perl6.nqp.runtime;
 
+import com.sun.jna.NativeLibrary;
+
 import org.perl6.nqp.sixmodel.SixModelObject;
 
+import org.perl6.nqp.sixmodel.reprs.NativeCallInstance;
+
 public final class NativeCallOps {
     public static long init() {
         /* Nothing to do here. The REPRs are all registered over in
@@ -10,10 +14,33 @@ public static long init() {
     }
 
     public static long build(SixModelObject target, String libname, String symbol, String convention, SixModelObject arguments, SixModelObject returns) {
+        NativeCallInstance call = getNativeCallInstance(target);
+
+        /* Load the library and locate the symbol. */
+        /* TODO: Error handling! */
+        NativeLibrary library = NativeLibrary.getInstance(libname);
+        call.entry_point = library.getFunction(symbol);
+
+        /* TODO: Set the calling convention. */
+
+        /* Set up the argument types. */
+
         return 1L;
     }
 
     public static SixModelObject call(SixModelObject returns, SixModelObject call, SixModelObject arguments) {
         return null;
     }
+
+    private static NativeCallInstance getNativeCallInstance(SixModelObject target) {
+        NativeCallInstance call;
+        if (target instanceof NativeCallInstance) {
+            call = (NativeCallInstance) target;
+        }
+        else {
+            /* TODO: Handle box target stuff here. */
+            call = null;
+        }
+        return call;
+    }
 }

src/vm/jvm/runtime/org/perl6/nqp/sixmodel/reprs/NativeCallInstance.java

@@ -1,5 +1,7 @@
 package org.perl6.nqp.sixmodel.reprs;
 
+import com.sun.jna.Function;
+
 import org.perl6.nqp.sixmodel.SixModelObject;
 
 public class NativeCallInstance extends SixModelObject {
@@ -26,4 +28,6 @@ public class NativeCallInstance extends SixModelObject {
     public static final byte ARG_NO_FREE_STR   = 0;
     public static final byte ARG_FREE_STR      = 1;
     public static final byte ARG_FREE_STR_MASK = 1;
+
+    public Function entry_point;
 }