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Developing Code with Threads
Writing code to support a thread-based implementation is very straightforward. Simple APIs are presented to the developer for each threads package. Actually, there are striking similarities between thread implementations on NetWare, Windows NT, and OS/2. We will use the Worker Model example of threads implementation introduced in the previous section. This example will be extended to include specifics for creating, controlling, and exiting threads for each platform. Listing shows the pseudocode representation of our example. We will only modify commands relating to threads in this example. Those commands will be highlighted and all other pseudocode will be left as-is.
LISTING
AcceptRegistrationRequests()
{
do {
.......
WaitForClientRequestration( )
RegisterClient()
RegisterAsUser
StartWorkerThread ()
} while (FOREVER)
}
WorkerThread()
WaitForInterval ()
if (CheckForWorkRequest() ) {
Process Request ( )
Send Response ( )
} while(CLIENT_CONNECTED)
LeaveThread( )
What is a sequential file? A file that is read one record or block or parameter at a time in order, based on a tape model of a file.
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Q. The RC 4000 system as well as other systems have defined a tree of processes (called a process tree) such that all the descendants of a process are given resources (objects) as
IMPLEMENTATION OF SEGMENTATION WITH AN EXAMPLE Segmentation is a memory-management scheme that represents the user view of memory. A logical address space is the collection of
define pipe
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