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Diffstat (limited to 'src/java/com/jogamp/common/os/Platform.java')
| -rw-r--r-- | src/java/com/jogamp/common/os/Platform.java | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/java/com/jogamp/common/os/Platform.java b/src/java/com/jogamp/common/os/Platform.java new file mode 100644 index 0000000..169af13 --- /dev/null +++ b/src/java/com/jogamp/common/os/Platform.java @@ -0,0 +1,163 @@ +/* + * Copyright (c) 2010, Michael Bien, Sven Gothel + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * * Neither the name of Michael Bien nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 Michael Bien 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. + */ + +/* + * 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; + +/** + * Utility class for querying platform specific properties. + * @author Michael Bien, Sven Gothel + */ +public class Platform { + + public static final boolean JAVA_SE; + public static final boolean LITTLE_ENDIAN; + + private final static boolean is32Bit; + private final static int pointerSizeInBits; + private final static String os, arch; + + 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(); + + // Try to use Sun's sun.arch.data.model first .. + if ( 32 == pointerSizeInBits || 64 == pointerSizeInBits ) { + is32Bit = ( 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"))) { + is32Bit = 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"))) { + is32Bit = false; + }else{ + throw new RuntimeException("Please port CPU detection (32/64 bit) to your platform (" + os_lc + "/" + arch_lc + ")"); + } + } + + // fast path + boolean se = System.getProperty("java.runtime.name").indexOf("Java SE") != -1; + + if(!se) { + try{ + Class.forName("java.nio.LongBuffer"); + Class.forName("java.nio.DoubleBuffer"); + se = true; + }catch(ClassNotFoundException ex) { + se = false; + } + } + JAVA_SE = se; + + // byte order + 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); + LITTLE_ENDIAN = 0x0C0D == tst_s.get(0); + } + + private Platform() {} + + 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; + } + +} + + |