/*
* This is the loop for the supervisor thread. It waits for 100ms, then
* simulates one interval of time.
*/
static void simulator_supervisor_thread(void)
{
print_gantt_header();
/* Loop, performing execution every 100ms. At each execution, we will
display a line in the Gantt chart and check for pending I/O requests */
while (1)
{
pthread_mutex_lock(&simulator_mutex);
/* Exit when all processes terminate */
if (processes_terminated >= PROCESS_COUNT)
{
print_final_stats();
exit(0);
}
print_gantt_line();
simulate_cpus();
simulate_io();
simulate_creat();
simulator_time++;
pthread_mutex_unlock(&simulator_mutex);
mt_safe_usleep(1);
}
}
/*
* idle() is your idle process. It is called by the simulator when the idle
* process is scheduled.
*
* This function should block until a process is added to your ready queue.
* It should then call schedule() to select the process to run on the CPU.
*/
extern void idle(unsigned int cpu_id)
{
/* FIX ME */
schedule(0);
/*
* REMOVE THE LINE BELOW AFTER IMPLEMENTING IDLE()
*
* idle() must block when the ready queue is empty, or else the CPU threads
* will spin in a loop. Until a ready queue is implemented, we'll put the
* thread to sleep to keep it from consuming 100% of the CPU time. Once
* you implement a proper idle() function using a condition variable,
* remove the call to mt_safe_usleep() below.
*/
mt_safe_usleep(1000000);
}
