fixed pointer issues

simulator.c

@@ -42,20 +42,20 @@ void print_pinfo(struct pinfo * info) {
     printf("  Arrival time: %d\n", info->arrival_time);
     printf("  Execution time: %d\n", info->execution_time);
     printf("  Priority: %d\n", info->priority);
+    printf("  NEXT -> %p\n", info->next_pinfo);
     printf("}>\n");
 }
 
-struct pinfo create_process(int id, int arrival_time, int execution_time, int priority) {
-    struct pinfo info = {
-        id,
-        arrival_time,
-        execution_time,
-        priority,
-        0,
-        0,
-        WAITING,
-        NULL
-    };
+struct pinfo * create_process(int id, int arrival_time, int execution_time, int priority) {
+    struct pinfo * info = malloc(sizeof(struct pinfo));
+    info->id = id;
+    info->arrival_time = arrival_time;
+    info->execution_time = execution_time;
+    info->priority = priority;
+    info->wait_time = 0;
+    info->completion_time = 0;
+    info->state = WAITING;
+    info->next_pinfo = NULL;
     return info;
 }
 
@@ -93,7 +93,7 @@ struct pinfo * read_file() {
 
     struct pinfo * first = NULL;
     struct pinfo * last = NULL;
-    struct pinfo process;
+    struct pinfo * process;
 
     while (fgets(line, buf_size, file)) {
         pid_str = strtok(line, " ");
@@ -110,17 +110,18 @@ struct pinfo * read_file() {
 
         // If linked list not initialized
         if (first == NULL) {
-            first = &process;
+            first = process;
         }
 
         // If there is an element in list
         if (last != NULL) {
-            last->next_pinfo = &process;
+            last->next_pinfo = process;
         }
-        last = &process;
+        last = process;
 
-        print_pinfo(&process);
+        print_pinfo(process);
     }
+    free(line);
     fclose(file);
     return first;
 }
@@ -129,13 +130,24 @@ void write_file(struct pinfo * process, struct perf_info * perf) {
     // TODO
 }
 
+void free_processes(struct pinfo * next) {
+    struct pinfo * cur;
+    while (next != NULL) {
+        cur = next;
+        next = cur->next_pinfo;
+        free(cur);
+    }
+}
+
 int main() {
     struct pinfo * processes = read_file();
 
-    /*struct perf_info perf = schedule_FCFS(processes);
+    //struct perf_info perf = schedule_FCFS(processes);
 
-    write_file(processes, &perf);
-    print_perf(perf);*/
+    //write_file(processes, &perf);
+    //print_perf(&perf);
+
+    free_processes(processes);
 
     return 0;
 }