2023-10-27 10:42:23 -03:00
|
|
|
#include <stdio.h>
|
2023-10-27 11:24:40 -03:00
|
|
|
#include <pthread.h>
|
2023-10-27 12:23:06 -03:00
|
|
|
#include <semaphore.h>
|
|
|
|
#include <stdlib.h>
|
2023-10-27 10:42:23 -03:00
|
|
|
#include "lib/queue.h"
|
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
// TODO: Look into semaphore increment too much in print function, look into synchronization
|
|
|
|
|
|
|
|
|
2023-10-27 10:42:23 -03:00
|
|
|
#define MAX_USERNAME_LENGTH 100
|
|
|
|
int QUANTUM;
|
2023-10-27 11:24:40 -03:00
|
|
|
int CPUS;
|
2023-10-27 12:23:06 -03:00
|
|
|
int TIME = 0;
|
|
|
|
|
|
|
|
// Semaphore for the print function
|
|
|
|
sem_t print_semaphore;
|
|
|
|
|
|
|
|
typedef struct ThreadArgs {
|
|
|
|
int cpu_id;
|
|
|
|
char *print_buffer;
|
|
|
|
Queue *summary_queue;
|
|
|
|
Queue *in_queue;
|
|
|
|
} ThreadArgs;
|
|
|
|
|
|
|
|
ThreadArgs *createArgs(int cpu_id, char* print_buffer, Queue *summary_queue, Queue *in_queue) {
|
|
|
|
ThreadArgs *args = malloc(sizeof(ThreadArgs));
|
|
|
|
args->cpu_id = cpu_id;
|
|
|
|
args->print_buffer = print_buffer;
|
|
|
|
args->summary_queue = summary_queue;
|
|
|
|
args->in_queue = in_queue;
|
|
|
|
return args;
|
|
|
|
}
|
2023-10-27 10:42:23 -03:00
|
|
|
|
|
|
|
Queue *input_queue() {
|
|
|
|
Queue *queue = createQueue();
|
|
|
|
char username[MAX_USERNAME_LENGTH]; // username buffer
|
|
|
|
char job;
|
2023-10-27 11:24:40 -03:00
|
|
|
int arrival_time, duration, affinity;
|
2023-10-27 10:42:23 -03:00
|
|
|
|
|
|
|
scanf("%d", &QUANTUM);
|
|
|
|
while (getchar() != '\n'); // clear the newline from the buffer
|
|
|
|
|
2023-10-27 11:24:40 -03:00
|
|
|
scanf("%d", &CPUS);
|
|
|
|
while (getchar() != '\n'); // clear the newline from the buffer
|
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
// Make sure sem is init right after getting cpus
|
|
|
|
sem_init(&print_semaphore, 0, CPUS); // Initialize the semaphore
|
|
|
|
|
2023-10-27 11:24:40 -03:00
|
|
|
while (getchar() != '\n'); // ignore the rest of the line, this is the table line
|
2023-10-27 10:42:23 -03:00
|
|
|
// Loop through the process table and enqueue each process
|
2023-10-27 11:24:40 -03:00
|
|
|
while (scanf("%99s %c %d %d %d", username, &job, &arrival_time, &duration, &affinity) != EOF) {
|
|
|
|
Process *process = createProcess(username, job, arrival_time, duration, affinity);
|
2023-10-27 10:42:23 -03:00
|
|
|
enqueue(queue, process);
|
|
|
|
}
|
|
|
|
return queue;
|
|
|
|
}
|
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
void* print(void *args) {
|
|
|
|
// Cast args and create local variables
|
|
|
|
ThreadArgs *thread_args = (ThreadArgs*) args;
|
|
|
|
char *print_buffer = thread_args->print_buffer;
|
|
|
|
Queue *summary_queue = thread_args->summary_queue;
|
|
|
|
Queue *in_queue = thread_args->in_queue;
|
2023-10-27 11:24:40 -03:00
|
|
|
|
|
|
|
// Print the Time label as well as the CPU labels
|
|
|
|
printf("Time");
|
|
|
|
for (int i = 0; i < CPUS; i++) {
|
|
|
|
printf("\tCPU%d", i);
|
|
|
|
}
|
|
|
|
printf("\n");
|
2023-10-27 10:42:23 -03:00
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
for (int i = 0; i < in_queue->size; ++i) {
|
|
|
|
TIME++;
|
|
|
|
// Allow the simulation to begin
|
|
|
|
sem_post(&print_semaphore);
|
2023-10-27 11:24:40 -03:00
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
for (int j = 0; j < CPUS; ++j) {
|
|
|
|
printf("%d\t%c", TIME, print_buffer[i]);
|
|
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
// Print the summary
|
|
|
|
printf("\nSummary\n");
|
|
|
|
printList(summary_queue);
|
2023-10-27 11:24:40 -03:00
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
return NULL;
|
2023-10-27 11:24:40 -03:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
void* simulation(void *args) {
|
|
|
|
// Cast args and create local variables
|
|
|
|
ThreadArgs *thread_args = (ThreadArgs*) args;
|
|
|
|
Queue *in_queue = thread_args->in_queue;
|
|
|
|
Queue *summary_queue = thread_args->summary_queue;
|
|
|
|
char *print_buffer = thread_args->print_buffer;
|
|
|
|
int cpu_id = thread_args->cpu_id;
|
2023-10-27 11:24:40 -03:00
|
|
|
|
2023-10-27 10:42:23 -03:00
|
|
|
|
|
|
|
// Loop variables
|
|
|
|
int quantum = QUANTUM;
|
|
|
|
int addedJobs = 0;
|
2023-10-27 12:23:06 -03:00
|
|
|
Process *process = NULL;
|
2023-10-27 10:42:23 -03:00
|
|
|
|
|
|
|
// Create a queue for the simulation
|
|
|
|
Queue *sim_queue = createQueue();
|
|
|
|
while (true) {
|
2023-10-27 12:23:06 -03:00
|
|
|
sem_wait(&print_semaphore); // Wait for the print semaphore
|
2023-10-27 10:42:23 -03:00
|
|
|
// Begin going through all jobs and enqueueing them if they have arrived
|
|
|
|
process = in_queue->end;
|
|
|
|
for (int i = 0; i < in_queue->size; i++) {
|
2023-10-27 12:23:06 -03:00
|
|
|
if (process->affinity == cpu_id && process->arrival_time == TIME) {
|
2023-10-27 10:42:23 -03:00
|
|
|
// Create copy to keep the queues separate
|
2023-10-27 11:24:40 -03:00
|
|
|
Process *copy = createProcess(process->username, process->job, process->arrival_time, process->duration, process->affinity);
|
2023-10-27 10:42:23 -03:00
|
|
|
enqueue(sim_queue, copy);
|
|
|
|
addedJobs++;
|
|
|
|
}
|
|
|
|
process = process->prev_elem;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Begin printing the current job
|
|
|
|
process = sim_queue->end;
|
2023-10-27 12:23:06 -03:00
|
|
|
if (sim_queue->size == 0) { //If there is nothing in sim_queue, put '-' in the print buffer
|
|
|
|
print_buffer[cpu_id] = '-';
|
2023-10-27 10:42:23 -03:00
|
|
|
if (addedJobs == in_queue->size) {
|
|
|
|
break; // If all jobs have been added, and the simulation queue is empty, then we are done
|
|
|
|
}
|
|
|
|
} else {
|
2023-10-27 12:23:06 -03:00
|
|
|
print_buffer[cpu_id] = process->job;
|
2023-10-27 10:42:23 -03:00
|
|
|
process->duration--;
|
|
|
|
quantum--;
|
|
|
|
if (process->duration == 0) { // If the process is done, delete it
|
|
|
|
Process *temp = dequeue(sim_queue); // Store the process in a temp variable for deletion
|
2023-10-27 12:23:06 -03:00
|
|
|
search(summary_queue, temp->username)->finish_time = TIME; // Set the finish time for the summary queue
|
2023-10-27 10:42:23 -03:00
|
|
|
destroyProcess(temp); // This should be called on every process
|
|
|
|
quantum = QUANTUM; // Make sure to reset the quantum when a process is done
|
|
|
|
} else if (quantum == 0) { // If the quantum is 0, then we need to dequeue the process and enqueue it again
|
|
|
|
process = dequeue(sim_queue);
|
|
|
|
enqueue(sim_queue, process);
|
|
|
|
quantum = QUANTUM;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Free memory for the simulation queue. There should be nothing left in it
|
|
|
|
stop(sim_queue);
|
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
return NULL;
|
2023-10-27 10:42:23 -03:00
|
|
|
}
|
|
|
|
|
2023-10-27 12:23:06 -03:00
|
|
|
|
2023-10-27 10:42:23 -03:00
|
|
|
int main() {
|
|
|
|
Queue *in_queue = input_queue(); // Create the input queue
|
2023-10-27 12:23:06 -03:00
|
|
|
Queue *summary_queue = createQueue(); // Create the summary queue
|
|
|
|
char *print_buffer = malloc(sizeof(char) * CPUS); // Create the print buffer
|
|
|
|
|
|
|
|
// Summary creation
|
|
|
|
Process *process = in_queue->end;
|
|
|
|
for (int i = 0; i < in_queue->size; ++i) {
|
|
|
|
if (contains(summary_queue, process->username) == false) {
|
|
|
|
Process *copy = createProcess(process->username, process->job, process->arrival_time, process->duration, process->affinity);
|
|
|
|
enqueue(summary_queue, copy);
|
|
|
|
}
|
|
|
|
process = process->prev_elem;
|
|
|
|
}
|
2023-10-27 11:24:40 -03:00
|
|
|
|
|
|
|
// Create the print thread
|
|
|
|
pthread_t print_thread;
|
2023-10-27 12:23:06 -03:00
|
|
|
ThreadArgs *print_args = createArgs(0, print_buffer, summary_queue, in_queue);
|
|
|
|
pthread_create(&print_thread, NULL, &print, print_args);
|
2023-10-27 11:24:40 -03:00
|
|
|
|
|
|
|
// Create the simulation threads
|
|
|
|
pthread_t threads[CPUS];
|
2023-10-27 12:23:06 -03:00
|
|
|
ThreadArgs* args[CPUS]; // Array of arguments for each thread, so we can free them later
|
2023-10-27 11:24:40 -03:00
|
|
|
for (int i = 0; i < CPUS; i++) {
|
2023-10-27 12:23:06 -03:00
|
|
|
args[i] = createArgs(i, print_buffer, summary_queue, in_queue);
|
|
|
|
pthread_create(&threads[i], NULL, &simulation, args[i]);
|
2023-10-27 11:24:40 -03:00
|
|
|
}
|
|
|
|
|
|
|
|
// This should make sure all threads are done simulating, as the print function exits after simulation is done
|
|
|
|
pthread_join(print_thread, NULL);
|
|
|
|
// Just to make sure all threads are done
|
|
|
|
for (int i = 0; i < CPUS; i++) {
|
|
|
|
pthread_join(threads[i], NULL);
|
2023-10-27 12:23:06 -03:00
|
|
|
free(args[i]);
|
2023-10-27 11:24:40 -03:00
|
|
|
}
|
2023-10-27 10:42:23 -03:00
|
|
|
stop(in_queue); // Free memory for input queue
|
2023-10-27 12:23:06 -03:00
|
|
|
stop(summary_queue); // Free memory for summary queue
|
|
|
|
free(print_buffer); // Free memory for print buffer
|
2023-10-27 10:42:23 -03:00
|
|
|
return 0;
|
|
|
|
}
|