THREADS of OPERATING SYSTEM

Linux Threads

[ ] >Linux refers to them as tasks rather than threads

[ ] >Thread creation is done through clone() system call

[ ] >Clone() allows a child task to share the address space of the parent task (process)

Windows XP Threads


[ ]>Implements the one-to-one mapping

[ ]>Each thread contains
[ ]>A thread id
{}Register set
{}Separate user and kernel stacks
{}Private data storage area

[ ]>The register set, stacks, and private storage area are known as the context of the threads

[ ]>The primary data structures of a thread include:
{}ETHREAD (executive thread block)
{}KTHREAD (kernel thread block)
{}TEB (thread environment block)

Java Thread

• Java thread are managed by the JVM

• Java thread may created by:

> Extending thread class

> Implementing the Runnable inteface

• In Java, each thread is represented by an object of class java.lang.Thread, which handles the necessary bookkeeping and provides methods for controlling the thread