Update lab3/scheduler.cpp

lab3/scheduler.cpp

@@ -9,14 +9,87 @@
 
 using namespace std;
 
-void fifo() {
-	cout << "fifo" << endl;
-}
-
 struct process_detail {
-	vector<int> burst_times;
+	//cpu_burst_times[0] is arrival time
+	int pid;
+	vector<int> cpu_burst_times;
+	vector<int> io_burst_times;
+	int in_cpu;
+	int ptr = 0;
 };
 
+struct clock{
+	int push_signal; //boolean
+	int timer;
+	
+};
+
+//// operator overloading
+//struct CompareHeight {
+//    bool operator()(struct process_detail p1, struct process_detail p2)
+//    {
+//        // return "true" if "p1" is ordered
+//        // before "p2", for example:
+//        return p1.height < p2.height;
+//    }
+//};
+
+
+vector<struct process_detail> processes;
+vector<struct process_detail> ready_queue;
+queue<struct process_detail> ready_queue_fifo;
+vector<struct process_detail> waiting;
+struct process_detail* CPU = NULL;
+int clock = 0;
+
+void fifo() {
+	
+	//clock initialized to 0
+	struct clock time;
+	memset(&time, 0, sizeof(struct clock));
+	int process_count = processes.size();
+	
+	//ready queue initialized as process 1 will arrive at time 0
+	ready_queue_fifo.push(processes[0]);
+	processes[0].i++;
+	
+	while(true){
+		
+		//managing arrival times
+		for(int i = 0; i < process_count; ++i) {
+			//if process not in cpu
+			if(proccesses[i].in_cpu != 1) {
+				if(time.timer == processes[i].cpu_birst_times[0]) {
+					ready_queue_fifo.push(processes[ptr]);
+					processes[i].i++;
+				}
+			}
+		}
+		
+		//THE FIFO RULE
+		if(CPU == NULL) {
+			CPU = ready_queue_fifo.front();
+			CPU->in_cpu = 1;
+			ready_queue_fifo.pop();
+		}
+		else{
+			//check cpu_burst complete
+			for(int i = 0; i < process_count; ++i) {
+				if(proccesses[i].in_cpu == 1) {
+					if(timer.push_signal + CPU->cpu_birst_times[1] == time.timer){
+						waiting.push_back(CPU);
+					}
+				}
+			}
+		}
+		time.timer++;
+		
+	}
+	
+	cout << "fifo" << endl;
+	return;
+}
+
 int main(int argc, char **argv) {
 
     if(argc != 3)
@@ -30,10 +103,9 @@ int main(int argc, char **argv) {
     char *file_to_search_in = argv[1];
 	char *scheduler_algorithm = argv[2];
 
-    vector<struct process_detail> processes_detail;
     ifstream file(file_to_search_in, ios::binary);
     string buffer;
-
+    int pid = 1;
 
     while(getline(file, buffer)) {
 		if(buffer[0] == '<'){
@@ -45,10 +117,20 @@ int main(int argc, char **argv) {
 		memset(&pd,0,sizeof(struct process_detail));
 
 		while(iss>>word){
-			pd.burst_times.push_back(stoi(word));
-			cout << stoi(word) << endl;
+			if(i == 0){
+				pd.cpu_burst_times.push_back(stoi(word));
+			}
+			else if(i % 2 == 0){
+				pd.io_burst_times.push_back(stoi(word));
+			}
+			else if(i % 2 == 1){
+				pd.cpu_burst_times.push_back(stoi(word));
+			}
+			i++;
+//			cout << stoi(word) << endl;
 		}
-		processes_detail.push_back(pd);
+		pd.pid = pid;
+		processes.push_back(pd);
     }
 
 	map<string, int> temp;