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<a name="1102288"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">7.3 Queues</font>
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<a name="1102289"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">There may be any number of processes waiting for execution, so a queue (that is, a linked list) of waiting processes is formed, called the scheduling queue. This is an example of a general queue supported by the instruction set for queueing waiting processes. </font>
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<a name="1102294"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A queue is a linked list of process control blocks, formed by links included in the process control blocks. Each link points to the control block of the next process in the queue unless it is the last in the queue, which is undefined. </font>
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<a name="1102295"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The front and back pointers of a queue are held in a queue control block, as shown in <a href="mult_ts4.htm#1104679"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Table
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