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clang-format and clang-tidy fixes for 295f0cc6
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@ -2,17 +2,18 @@
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* @file fcfs_scheduling.cpp
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* @brief Implementation of FCFS CPU scheduling algorithm
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* @details
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* FCFS is a non-preemptive CPU scheduling algorithm in which whichever process arrives first, gets executed first.
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* If two or more processes arrive simultaneously, the process with smaller process ID gets executed first.
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* FCFS is a non-preemptive CPU scheduling algorithm in which whichever process
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* arrives first, gets executed first. If two or more processes arrive
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* simultaneously, the process with smaller process ID gets executed first.
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* @link https://bit.ly/3ABNXOC
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* @author Pratyush Vatsa(https://github.com/Pratyush219)
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*/
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#include <iostream> // for IO operations
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#include <vector> // for using vector
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#include <unordered_set> // for using unordered_set
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#include <queue> // for priority_queue
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#include <iomanip> // for formatting the output
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#include <iostream> // for IO operations
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#include <queue> // for priority_queue
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#include <unordered_set> // for using unordered_set
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#include <vector> // for using vector
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using std::cin;
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using std::cout;
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@ -38,11 +39,15 @@ class Compare{
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/**
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* @param t1: first tuple
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* @param t2: second tuple
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* @brief A comparator function that checks whether to swap the two tuples or not.
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* @link Refer https://www.geeksforgeeks.org/comparator-class-in-c-with-examples/ for detailed description of comparator
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* @brief A comparator function that checks whether to swap the two tuples
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* or not.
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* @link Refer
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* https://www.geeksforgeeks.org/comparator-class-in-c-with-examples/ for
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* detailed description of comparator
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* @returns true if the tuples should be swapped, false othewise
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*/
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bool operator () (tuple<S, T, E, double, double, double>& t1, tuple<S, T, E, double, double, double>& t2){
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bool operator()(tuple<S, T, E, double, double, double>& t1,
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tuple<S, T, E, double, double, double>& t2) {
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// Compare arrival times
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if (get<1>(t2) < get<1>(t1)) {
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return true;
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@ -82,7 +87,8 @@ class FCFS{
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// Stores final status of all the processes after completing the execution.
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vector<tuple<S, T, E, double, double, double>> result;
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// Stores process IDs. Used for confirming absence of a process while adding it.
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// Stores process IDs. Used for confirming absence of a process while adding
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// it.
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unordered_set<S> idList;
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public:
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@ -97,20 +103,25 @@ class FCFS{
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void addProcess(S id, T arrival, E burst) {
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// Add if a process with process ID as id is not found in idList.
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if (idList.find(id) == idList.end()) {
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tuple<S, T, E, double, double, double> t = make_tuple(id, arrival, burst, 0, 0, 0);
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tuple<S, T, E, double, double, double> t =
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make_tuple(id, arrival, burst, 0, 0, 0);
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schedule.push(t);
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idList.insert(id);
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}
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}
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/**
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* @brief Algorithm for scheduling CPU processes according to the First Come First Serve(FCFS) scheduling algorithm.
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* @brief Algorithm for scheduling CPU processes according to the First Come
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* First Serve(FCFS) scheduling algorithm.
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*
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* @description FCFS is a non-preemptive algorithm in which the process which arrives first gets executed first. If two or
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* more processes arrive together then the process with smaller process ID runs first (each process has a unique proces ID).
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* @description FCFS is a non-preemptive algorithm in which the process
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* which arrives first gets executed first. If two or more processes arrive
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* together then the process with smaller process ID runs first (each
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* process has a unique proces ID).
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*
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* I used a min priority queue of tuples to accomplish this task. The processes are ordered by their arrival times. If arrival
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* times of some processes are equal, then they are ordered by their process ID.
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* I used a min priority queue of tuples to accomplish this task. The
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* processes are ordered by their arrival times. If arrival times of some
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* processes are equal, then they are ordered by their process ID.
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*
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* @returns void
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*/
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@ -130,7 +141,8 @@ class FCFS{
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// Add Burst time to time elapsed
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timeElapsed += get<2>(cur);
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// Completion time of the current process will be same as time elapsed so far
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// Completion time of the current process will be same as time
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// elapsed so far
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get<3>(cur) = timeElapsed;
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// Turnaround time = Completion time - Arrival time
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@ -146,27 +158,28 @@ class FCFS{
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}
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/**
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* @brief Utility function for printing the status of each process after execution
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* @brief Utility function for printing the status of each process after
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* execution
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* @returns void
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*/
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void printResult() {
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cout << "Status of all the proceses post completion is as follows:" << endl;
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cout << "Status of all the proceses post completion is as follows:"
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<< endl;
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cout << std::setw(17) << left << "Process ID"
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<< std::setw(17) << left << "Arrival Time"
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<< std::setw(17) << left << "Burst Time"
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<< std::setw(17) << left << "Completion Time"
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<< std::setw(17) << left << "Turnaround Time"
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<< std::setw(17) << left << "Waiting Time" << endl;
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cout << std::setw(17) << left << "Process ID" << std::setw(17) << left
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<< "Arrival Time" << std::setw(17) << left << "Burst Time"
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<< std::setw(17) << left << "Completion Time" << std::setw(17)
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<< left << "Turnaround Time" << std::setw(17) << left
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<< "Waiting Time" << endl;
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for (size_t i{}; i < result.size(); i++) {
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cout << std::setprecision(2) << std::fixed
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<< std::setw(17) << left << get<0>(result[i])
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<< std::setw(17) << left << get<1>(result[i])
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<< std::setw(17) << left << get<2>(result[i])
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<< std::setw(17) << left << get<3>(result[i])
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<< std::setw(17) << left << get<4>(result[i])
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<< std::setw(17) << left << get<5>(result[i]) << endl;
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cout << std::setprecision(2) << std::fixed << std::setw(17) << left
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<< get<0>(result[i]) << std::setw(17) << left
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<< get<1>(result[i]) << std::setw(17) << left
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<< get<2>(result[i]) << std::setw(17) << left
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<< get<3>(result[i]) << std::setw(17) << left
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<< get<4>(result[i]) << std::setw(17) << left
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<< get<5>(result[i]) << endl;
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}
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}
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};
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@ -181,13 +194,11 @@ int main(){
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// Sample test case
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int n = 3;
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vector<tuple<uint32_t, uint32_t, uint32_t>> input = {
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make_tuple(1, 0, 30),
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make_tuple(2, 0, 5),
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make_tuple(3, 0, 5)
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};
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make_tuple(1, 0, 30), make_tuple(2, 0, 5), make_tuple(3, 0, 5)};
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for (uint32_t i{}; i < n; i++) {
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readyQueue.addProcess(get<0>(input[i]), get<1>(input[i]), get<2>(input[i]));
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readyQueue.addProcess(get<0>(input[i]), get<1>(input[i]),
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get<2>(input[i]));
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}
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readyQueue.scheduleForFcfs();
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