GlueGen proper size / alignment of primitive and compound types usage [1/2] - Preparation.

Fix commit f733203dfbd034a6b1aa3eb2cd616437c982c435,
adding missing file src/java/jogamp/common/os/MachineDescriptionRuntime.java

1 files changed, 120 insertions, 0 deletions

diff --git a/src/java/jogamp/common/os/MachineDescriptionRuntime.java b/src/java/jogamp/common/os/MachineDescriptionRuntime.java
new file mode 100644
index 0000000..f904151
--- /dev/null
+++ b/src/java/jogamp/common/os/MachineDescriptionRuntime.java
@@ -0,0 +1,120 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+ 
+package jogamp.common.os;
+
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.os.MachineDescription;
+import com.jogamp.common.os.NativeLibrary;
+
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.nio.ShortBuffer;
+
+/**
+ * Runtime MachineDescription
+ */
+public class MachineDescriptionRuntime {
+
+  public static MachineDescription getMachineDescription(boolean is32BitByCPUArch) {
+        boolean libsLoaded = true;
+        try {
+            NativeLibrary.ensureNativeLibLoaded();
+        } catch (UnsatisfiedLinkError err) {
+            libsLoaded = false;
+        }
+        
+        if(libsLoaded) {
+            int pointerSizeInBytes = getPointerSizeInBytesImpl();
+            switch(pointerSizeInBytes) {
+                case 4:
+                case 8:
+                    break;
+                default:
+                    throw new RuntimeException("Unsupported pointer size "+pointerSizeInBytes+"bytes, please implement.");
+            }
+
+            final long pageSizeL =  getPageSizeInBytesImpl();
+            if(Integer.MAX_VALUE < pageSizeL) {
+                throw new InternalError("PageSize exceeds integer value: " + pageSizeL);
+            }
+            
+            return getMachineDescriptionImpl(pointerSizeInBytes, (int) pageSizeL);
+        } else {
+            if(is32BitByCPUArch) {
+                return new MachineDescription32Bit();            
+            } else {
+                return new MachineDescription64Bit();            
+            }
+        }
+    }
+
+    private static MachineDescription getMachineDescriptionImpl(int pointerSize, int pageSize) {
+        // size:      char, short, int, long, float, double, pointer
+        // alignment: int8, int16, int32, int64, char, short, int, long, float, double, pointer
+        return new MachineDescription( 
+            true /* runtime validated */,
+            isLittleEndianImpl(),
+            getSizeOfCharImpl(), getSizeOfShortImpl(), getSizeOfIntImpl(), getSizeOfLongImpl(),
+            getSizeOfFloatImpl(), getSizeOfDoubleImpl(), pointerSize, pageSize,
+            
+            getAlignmentInt8Impl(), getAlignmentInt16Impl(), getAlignmentInt32Impl(), getAlignmentInt64Impl(),
+            getAlignmentCharImpl(), getAlignmentShortImpl(), getAlignmentIntImpl(), getAlignmentLongImpl(), 
+            getAlignmentFloatImpl(), getAlignmentDoubleImpl(), getAlignmentPointerImpl());        
+    }
+    private static boolean isLittleEndianImpl() {
+        ByteBuffer tst_b = Buffers.newDirectByteBuffer(Buffers.SIZEOF_INT); // 32bit in native order
+        IntBuffer tst_i = tst_b.asIntBuffer();
+        ShortBuffer tst_s = tst_b.asShortBuffer();
+        tst_i.put(0, 0x0A0B0C0D);
+        return 0x0C0D == tst_s.get(0);
+    }
+    
+    private static native int getPointerSizeInBytesImpl();
+    private static native long getPageSizeInBytesImpl();
+    
+    private static native int getAlignmentInt8Impl();
+    private static native int getAlignmentInt16Impl();
+    private static native int getAlignmentInt32Impl();
+    private static native int getAlignmentInt64Impl();
+    private static native int getAlignmentCharImpl();
+    private static native int getAlignmentShortImpl();
+    private static native int getAlignmentIntImpl();
+    private static native int getAlignmentLongImpl();
+    private static native int getAlignmentPointerImpl();
+    private static native int getAlignmentFloatImpl();
+    private static native int getAlignmentDoubleImpl();
+    private static native int getSizeOfCharImpl();
+    private static native int getSizeOfShortImpl();
+    private static native int getSizeOfIntImpl();
+    private static native int getSizeOfLongImpl();
+    private static native int getSizeOfPointerImpl();
+    private static native int getSizeOfFloatImpl();
+    private static native int getSizeOfDoubleImpl();    
+}
+