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Diffstat (limited to 'gcc-4.2.1/libjava/classpath/vm/reference/java/lang/VMSystem.java')
| -rw-r--r-- | gcc-4.2.1/libjava/classpath/vm/reference/java/lang/VMSystem.java | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/gcc-4.2.1/libjava/classpath/vm/reference/java/lang/VMSystem.java b/gcc-4.2.1/libjava/classpath/vm/reference/java/lang/VMSystem.java deleted file mode 100644 index bf46b27aa..000000000 --- a/gcc-4.2.1/libjava/classpath/vm/reference/java/lang/VMSystem.java +++ /dev/null @@ -1,220 +0,0 @@ -/* VMSystem.java -- helper for java.lang.system - Copyright (C) 1998, 2002, 2004 Free Software Foundation - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - -package java.lang; - -import java.util.List; - -import java.io.BufferedInputStream; -import java.io.BufferedOutputStream; -import java.io.FileDescriptor; -import java.io.FileInputStream; -import java.io.FileOutputStream; -import java.io.InputStream; -import java.io.PrintStream; - -/** - * VMSystem is a package-private helper class for System that the - * VM must implement. - * - * @author John Keiser - * @author Andrew John Hughes (gnu_andrew@member.fsf.org) - */ -final class VMSystem -{ - /** - * Copy one array onto another from <code>src[srcStart]</code> ... - * <code>src[srcStart+len-1]</code> to <code>dest[destStart]</code> ... - * <code>dest[destStart+len-1]</code>. First, the arguments are validated: - * neither array may be null, they must be of compatible types, and the - * start and length must fit within both arrays. Then the copying starts, - * and proceeds through increasing slots. If src and dest are the same - * array, this will appear to copy the data to a temporary location first. - * An ArrayStoreException in the middle of copying will leave earlier - * elements copied, but later elements unchanged. - * - * @param src the array to copy elements from - * @param srcStart the starting position in src - * @param dest the array to copy elements to - * @param destStart the starting position in dest - * @param len the number of elements to copy - * @throws NullPointerException if src or dest is null - * @throws ArrayStoreException if src or dest is not an array, if they are - * not compatible array types, or if an incompatible runtime type - * is stored in dest - * @throws IndexOutOfBoundsException if len is negative, or if the start or - * end copy position in either array is out of bounds - */ - static native void arraycopy(Object src, int srcStart, - Object dest, int destStart, int len); - - /** - * Get a hash code computed by the VM for the Object. This hash code will - * be the same as Object's hashCode() method. It is usually some - * convolution of the pointer to the Object internal to the VM. It - * follows standard hash code rules, in that it will remain the same for a - * given Object for the lifetime of that Object. - * - * @param o the Object to get the hash code for - * @return the VM-dependent hash code for this Object - */ - static native int identityHashCode(Object o); - - /** - * Convert a library name to its platform-specific variant. - * - * @param libname the library name, as used in <code>loadLibrary</code> - * @return the platform-specific mangling of the name - * @XXX Add this method - static native String mapLibraryName(String libname); - */ - - /** - * Set {@link System#in} to a new InputStream. - * - * @param in the new InputStream - * @see #setIn(InputStream) - */ - static native void setIn(InputStream in); - - /** - * Set {@link System#out} to a new PrintStream. - * - * @param out the new PrintStream - * @see #setOut(PrintStream) - */ - static native void setOut(PrintStream out); - - /** - * Set {@link System#err} to a new PrintStream. - * - * @param err the new PrintStream - * @see #setErr(PrintStream) - */ - static native void setErr(PrintStream err); - - /** - * Get the current time, measured in the number of milliseconds from the - * beginning of Jan. 1, 1970. This is gathered from the system clock, with - * any attendant incorrectness (it may be timezone dependent). - * - * @return the current time - * @see java.util.Date - */ - public static long currentTimeMillis() - { - return nanoTime() / 1000000L; - } - - /** - * <p> - * Returns the current value of a nanosecond-precise system timer. - * The value of the timer is an offset relative to some arbitrary fixed - * time, which may be in the future (making the value negative). This - * method is useful for timing events where nanosecond precision is - * required. This is achieved by calling this method before and after the - * event, and taking the difference betweent the two times: - * </p> - * <p> - * <code>long startTime = System.nanoTime();</code><br /> - * <code>... <emph>event code</emph> ...</code><br /> - * <code>long endTime = System.nanoTime();</code><br /> - * <code>long duration = endTime - startTime;</code><br /> - * </p> - * <p> - * Note that the value is only nanosecond-precise, and not accurate; there - * is no guarantee that the difference between two values is really a - * nanosecond. Also, the value is prone to overflow if the offset - * exceeds 2^63. - * </p> - * - * @return the time of a system timer in nanoseconds. - * @since 1.5 - */ - public static native long nanoTime(); - - /** - * Returns a list of 'name=value' pairs representing the current environment - * variables. - * - * @return a list of 'name=value' pairs. - */ - static native List environ(); - - /** - * Helper method which creates the standard input stream. - * VM implementors may choose to construct these streams differently. - * This method can also return null if the stream is created somewhere - * else in the VM startup sequence. - */ - static InputStream makeStandardInputStream() - { - return new BufferedInputStream(new FileInputStream(FileDescriptor.in)); - } - - /** - * Helper method which creates the standard output stream. - * VM implementors may choose to construct these streams differently. - * This method can also return null if the stream is created somewhere - * else in the VM startup sequence. - */ - static PrintStream makeStandardOutputStream() - { - return new PrintStream(new BufferedOutputStream(new FileOutputStream(FileDescriptor.out)), true); - } - - /** - * Helper method which creates the standard error stream. - * VM implementors may choose to construct these streams differently. - * This method can also return null if the stream is created somewhere - * else in the VM startup sequence. - */ - static PrintStream makeStandardErrorStream() - { - return new PrintStream(new BufferedOutputStream(new FileOutputStream(FileDescriptor.err)), true); - } - - /** - * Gets the value of an environment variable. - * Always returning null is a valid (but not very useful) implementation. - * - * @param name The name of the environment variable (will not be null). - * @return The string value of the variable or null when the - * environment variable is not defined. - */ - static native String getenv(String name); -} |