net.openhft.chronicle.core

Class OS

java.lang.Object

net.openhft.chronicle.core.OS

public class OS
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OS.Unmapper

Field Summary

Fields

Modifier and Type	Field and Description
static String	HOST_NAME
static String	TARGET
static String	USER_NAME

Constructor Summary

Constructors

Constructor and Description
OS()

Method Summary

Modifier and Type	Method and Description
static long	getPidMax()
static int	getProcessId()
static boolean	is64Bit()
static boolean	isWindows() This may or may not be the OS thread id, but should be unique across processes
static long	map(FileChannel fileChannel, FileChannel.MapMode mode, long start, long size)
static long	mapAlign(long size)
static Memory	memory()
static int	pageSize()
static long	spaceUsed(String filename)
static void	unmap(long address, long size)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TARGET

public static final String TARGET

HOST_NAME

public static final String HOST_NAME

USER_NAME

public static final String USER_NAME

Constructor Detail

OS

public OS()

Method Detail

memory

public static Memory memory()

pageSize

public static int pageSize()

mapAlign

public static long mapAlign(long size)

is64Bit

public static boolean is64Bit()

getProcessId

public static int getProcessId()

isWindows

public static boolean isWindows()

This may or may not be the OS thread id, but should be unique across processes

Returns:

a unique tid of up to 48 bits.

getPidMax

public static long getPidMax()

map

public static long map(FileChannel fileChannel,
                       FileChannel.MapMode mode,
                       long start,
                       long size)
                throws IOException

Throws:

IOException

unmap

public static void unmap(long address,
                         long size)
                  throws IOException

Throws:

IOException

spaceUsed

public static long spaceUsed(String filename)