net.openhft.affinity.impl

Enum PosixJNAAffinity

java.lang.Object

java.lang.Enum<PosixJNAAffinity>

net.openhft.affinity.impl.PosixJNAAffinity

All Implemented Interfaces:

Serializable, Comparable<PosixJNAAffinity>, IAffinity

public enum PosixJNAAffinity
extends Enum<PosixJNAAffinity>
implements IAffinity

Implementation of IAffinity based on JNA call of sched_setaffinity(3)/sched_getaffinity(3) from 'c' library. Applicable for most linux/unix platforms

TODO Support assignment to core 64 and above

Author:

peter.lawrey, BegemoT

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	LOADED

Method Summary

Modifier and Type	Method and Description
BitSet	getAffinity()
int	getCpu()
int	getProcessId()
int	getThreadId()
static boolean	is64Bit()
void	setAffinity(BitSet affinity)
static PosixJNAAffinity	valueOf(String name) Returns the enum constant of this type with the specified name.
static PosixJNAAffinity[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final PosixJNAAffinity INSTANCE

Field Detail

LOADED

public static final boolean LOADED

Method Detail

values

public static PosixJNAAffinity[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (PosixJNAAffinity c : PosixJNAAffinity.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static PosixJNAAffinity valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

is64Bit

public static boolean is64Bit()

getAffinity

public BitSet getAffinity()

Specified by:

getAffinity in interface IAffinity

Returns:

returns affinity mask for current thread, or null if unknown

setAffinity

public void setAffinity(BitSet affinity)

Specified by:

setAffinity in interface IAffinity

Parameters:

affinity - sets affinity mask of current thread to specified value

getCpu

public int getCpu()

Specified by:

getCpu in interface IAffinity

Returns:

the current cpu id, or -1 if unknown.

getProcessId

public int getProcessId()

Specified by:

getProcessId in interface IAffinity

Returns:

the process id of the current process.

getThreadId

public int getThreadId()

Specified by:

getThreadId in interface IAffinity

Returns:

the thread id of the current thread or -1 is not available.