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/**
* 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.
*/
/*
* Created on Sunday, March 28 2010 14:43
*/
package com.jogamp.common.os;
import com.jogamp.common.nio.Buffers;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Utility class for querying platform specific properties.
* @author Michael Bien
* @author Sven Gothel
*/
public class Platform {
public static final boolean JAVA_SE;
public static final boolean LITTLE_ENDIAN;
public static final String OS;
public static final String ARCH;
private static final boolean is32Bit;
private static final int pointerSizeInBits;
static {
NativeLibrary.ensureNativeLibLoaded();
// We don't seem to need an AccessController.doPrivileged() block
// here as these system properties are visible even to unsigned
// applets
OS = System.getProperty("os.name");
ARCH = System.getProperty("os.arch");
pointerSizeInBits = getPointerSizeInBitsImpl();
is32Bit = initArch();
JAVA_SE = initIsJavaSE();
LITTLE_ENDIAN = initByteOrder();
}
private Platform() {}
private static boolean initArch() throws RuntimeException {
// Try to use Sun's sun.ARCH.data.model first ..
if ( 32 == pointerSizeInBits || 64 == pointerSizeInBits ) {
return 32 == pointerSizeInBits;
}else {
String os_lc = OS.toLowerCase();
String arch_lc = ARCH.toLowerCase();
if ((os_lc.startsWith("windows") && arch_lc.equals("x86")) ||
(os_lc.startsWith("windows") && arch_lc.equals("arm")) ||
(os_lc.startsWith("linux") && arch_lc.equals("i386")) ||
(os_lc.startsWith("linux") && arch_lc.equals("x86")) ||
(os_lc.startsWith("mac os_lc") && arch_lc.equals("ppc")) ||
(os_lc.startsWith("mac os_lc") && arch_lc.equals("i386")) ||
(os_lc.startsWith("darwin") && arch_lc.equals("ppc")) ||
(os_lc.startsWith("darwin") && arch_lc.equals("i386")) ||
(os_lc.startsWith("sunos_lc") && arch_lc.equals("sparc")) ||
(os_lc.startsWith("sunos_lc") && arch_lc.equals("x86")) ||
(os_lc.startsWith("freebsd") && arch_lc.equals("i386")) ||
(os_lc.startsWith("hp-ux") && arch_lc.equals("pa_risc2.0"))) {
return true;
} else if ((os_lc.startsWith("windows") && arch_lc.equals("amd64")) ||
(os_lc.startsWith("linux") && arch_lc.equals("amd64")) ||
(os_lc.startsWith("linux") && arch_lc.equals("x86_64")) ||
(os_lc.startsWith("linux") && arch_lc.equals("ia64")) ||
(os_lc.startsWith("mac os_lc") && arch_lc.equals("x86_64")) ||
(os_lc.startsWith("darwin") && arch_lc.equals("x86_64")) ||
(os_lc.startsWith("sunos_lc") && arch_lc.equals("sparcv9")) ||
(os_lc.startsWith("sunos_lc") && arch_lc.equals("amd64"))) {
return false;
}else{
throw new RuntimeException("Please port CPU detection (32/64 bit) to your platform (" + os_lc + "/" + arch_lc + ")");
}
}
}
private static boolean initIsJavaSE() {
// the fast path, check property Java SE instead of traversing through the ClassLoader
String java_runtime_name = (String) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return System.getProperty("java.runtime.name");
}
});
if(java_runtime_name.indexOf("Java SE") != -1) {
return true;
}
// probe for classes we need on a SE environment
try{
Class.forName("java.nio.LongBuffer");
Class.forName("java.nio.DoubleBuffer");
return true;
} catch(ClassNotFoundException ex) {
// continue with Java SE check
}
return false;
}
private static boolean initByteOrder() {
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 getPointerSizeInBitsImpl();
/**
* Returns true only if this program is running on the Java Standard Edition.
*/
public static boolean isJavaSE() {
return JAVA_SE;
}
/**
* Returns true only if this system uses little endian byte ordering.
*/
public static boolean isLittleEndian() {
return LITTLE_ENDIAN;
}
/**
* Returns the OS name.
*/
public static String getOS() {
return OS;
}
/**
* Returns the CPU architecture String.
*/
public static String getArch() {
return ARCH;
}
/**
* Returns true if this JVM is a 32bit JVM.
*/
public static boolean is32Bit() {
return is32Bit;
}
public static int getPointerSizeInBits() {
return pointerSizeInBits;
}
public static int getPointerSizeInBytes() {
return pointerSizeInBits/8;
}
}
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