struct Task
{
  int pid = 0;
  bool running = false;
  int exit_code = 0;
  int (*callback)(unsigned int);
  unsigned long run_interval = 0;
  unsigned long run_accumulator = 0;
  unsigned int signal = 0;
  unsigned int signal_mask = 0xFFFF;
};

void Kernel_setup();
void Kernel_tick();

// Panic and stop everything
void Kernel_panic(char* message);

// Start a new process
void Kernel_start(int (*callback)(unsigned int), unsigned long interval);
// Continue execution of a process
void Kernel_enable(int pid);
// Pause execution of a process
void Kernel_disable(int pid);
// Clean up exited process
void Kernel_reap(int pid);

// Check if process has exited
bool Kernel_is_exited(int pid);
// Get exit code of process
int Kernel_get_exit_code(int pid);

#define SIGNAL_NONE 0
#define SIGNAL_TICK 1
#define SIGNAL_START 2
#define SIGNAL_STOP 4