adhadse / OSPrograms

This repo holds my OS Lab programs for the Fourth Semester. Feel free to use and learn from them,

OS_programs

This repo holds my OS Lab programs for the Fourth Semester.

Feel free to use and learn from them.

📜CPUScheduler.cpp

This file holds Scheduler class for most commonly used functions and well as Process class for holding attributes of Process (Sort of Process Control Block).

The Scheduler class and classes which inherits this class uses Process objects to manipulate and simulate a certain type of scheduling. Examples of using these specialized class can be seen from the function written at end of the file, to learn the execution pattern.

The scheduler implemented are :

• Shortest Job First (SJF)
• Priority Scheduler with Non-Premption
• Priority Scheduler with Premption
• Shortest Remaining Time First (SRTF)
• Round Robin

The classes consist of (usually) 3 function, either inherited or overrided depending on the requirement of scehduler. These are:

• arrivedProcesses(): Describe which processes have arrived at a certain period of time for clock cycle.
• nextSuitableProcess(): Find the next suitable process from process list returned by arrivedProcesses() to be executed next (depending on the scheduling algorithm).
• execute(): This function execute the process one by one by calling nextSuitableProcess(). This is either implemented in Pre-emptive or Non-Premptive mode.

📜 BankersAlgorithm.cpp

This file implement and simulate a bankers algorithm in BankersAlgorithm on process objects of Process class.

📜 PageReplacer.kt

This file simulate a First-In First-Out (FIFO) Page Replacement algorithm in Kotlin

📜 CPUScheduler.kt

This file was originally written for scheduler class but later on I wrote most of them in C++.

If you love ♥ to see the code in KOTLIN, which is much more easier to read; read this to get a hang of the code before switching to C++ programs.