1 /*
   2  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package com.apple.jobjc;
  26 
  27 import com.apple.jobjc.Coder.PrimitivePointerCoder;
  28 
  29 
  30 class FFIType{
  31     private static native void makeFFIType(long ffi_type_buf, long elements_buf);
  32     private static native int  getFFITypeSizeof();
  33     private static int FFI_TYPE_SIZEOF = getFFITypeSizeof();
  34     final NativeBuffer ffi_type;
  35     final NativeBuffer elements;
  36     final Coder[] elementCoders;
  37 
  38     public FFIType(final Coder... elementCoders){
  39         final JObjCRuntime runtime = JObjCRuntime.inst();
  40         this.elementCoders = elementCoders;
  41         this.ffi_type = new NativeBuffer(FFI_TYPE_SIZEOF);
  42         this.elements = new NativeBuffer(JObjCRuntime.PTR_LEN * (elementCoders.length + 1));
  43 
  44         long elIterPtr = elements.bufferPtr;
  45         for(Coder c : elementCoders){
  46             PrimitivePointerCoder.INST.push(runtime, elIterPtr, c.getFFITypePtr());
  47             elIterPtr += PrimitivePointerCoder.INST.sizeof();
  48         }
  49         PrimitivePointerCoder.INST.push(runtime, elIterPtr, 0);
  50 
  51         makeFFIType(ffi_type.bufferPtr, elements.bufferPtr);
  52     }
  53 
  54     public long getPtr(){
  55         return ffi_type.bufferPtr;
  56     }
  57 }