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$25-$CIS$450-\frac{002}{E}$

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BORNCIS$450$&ECE$478$KhalilWinter$2024/$chapter$/2/$section$/5$

home $>2\mathrm{.}5$ : Resources

ENGE

$2\mathrm{.}5\mathrm{.}1$: Resource handling.

Dllowing diagram shows the process$\_$state and other$\_$resources fields of $4$ processes in the PCB array. The RCB array sh ate and the waiting $\_$list of $4$ resources.

$045054$ pcsion $7$

Jump to level $1$

The ready list RL contains processes $0$ then $2.$ Consider $(1),(2)$ as independent operations.

$(1)$ Process $0$ requests resource $2.$ After the operation:

Processo is Select $v$

Resource $2$ s wating list Select $,V$

Resource $2$ is Select $v$

RL contains the processes Ex:$1,2,3$

$(2)$ Process $0$ requests resource $1.$ After the operation.

Process $0$:$5$ Select $V$

Resource Is wating st $[5$

Resource $15\sqrt[\phantom{2}]{\text{S}\text{e}\text{e}\text{c}\text{t}v}$

RL conta ns the processes Ex $1\mathrm{.}23$