#include "kernel.h"
#include "process.h"

extern struct process_t* processes_list;
extern struct process_t* current_process;

void scheduler_init()
{
    // Choose first process?
    current_process = processes_list;
}

struct cpu_status_t* scheduler_schedule(struct cpu_status_t* context)
{
    current_process->context = context;
    current_process->status = READY;

    for (;;) {
        struct process_t* prev_process = current_process;
        if (current_process->next != NULL)
        {
            current_process = current_process->next;
        } else
        {
            current_process = processes_list;
        }
        
        if (current_process != NULL && current_process->status == DEAD)
        {
            process_delete(&prev_process, current_process);
        } else
        {
            current_process->status = RUNNING;
            break;
        }
    }
    
    DEBUG("SCHEDULER CALLED: current_process=%p", current_process);
    return current_process->context;
}