US 2003/0126187 A1 · Apparatus and method for synchronization in a multi-thread system of JAVA virtual machine

Abstract

There is provided an apparatus and a method for synchronization in a multi-thread system of a JAVA virtual machine. The apparatus and the method increase the concurrency of the multi-thread system by subdividing the unit of locking, which is used for implementing thread synchronizing, from object level to object field level. Because the apparatus and the method improve the possibility of sharing an object by subdividing the locking unit for synchronization into field level, the system processing speed can be improved when the apparatus and the method are used as a substructure of the multi-thread system of the JAVA virtual machine or a multi-processor. In addition, because reserved byte-codes in the specification of the JAVA virtual machine are extended, there is no effect on a user of the JAVA virtual machine.

Claims6

Dependent claims

An apparatus, which subdivides a synchronizing unit from object level to object field level, for synchronization in a multi-thread system of a JAVA virtual machine, the apparatus comprising:

a lock table associated with each of classes in the JAVA virtual machine;
a monitor for referring to information on whether a shared lock and an exclusive lock are available in connection with an object and a lock table of a class which the object belongs to;
a lock table instance of the object;
a field lock manager for managing the availability of a field lock of the object and a waiting list of threads.

1 more element

Dependencies are inferred from the claim text.

Apparatus and method for synchronization in a multi-thread system of JAVA virtual machine

Life of this patent

Apparatus and method for synchronization in a multi-thread system of JAVA virtual machine

Life of this patent

Abstract

Claims6