July 2008
Intermediate to advanced
544 pages
16h 52m
English
Content preview from Computers as Components, 2nd Edition
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316 CHAPTER 6 Processes and Operating Systems
processClass 1
myAttributes
myOperations( )
Signals
start
resume
FIGURE 6.10
An active class in UML.
p1: processClass1
master: masterClass
w: wrapperClass
ahat: fullMsg
a: rawMsg
FIGURE 6.11
A collaboration diagram with active and normal objects.
6.3 PRIORITY-BASED SCHEDULING
Now that we have a priority-based context switching mechanism, we have to
determine an algorithm by which to assign priorities to processes. After assign-
ing priorities, the OS takes care of the rest by choosing the highest-priority ready
process. There are two major ways to assign priorities: static priorities that do not
change during execution ...