void green_cond_wait(green_cond_t* suspended, green_mutex_t *mutex){

  sigprocmask(SIG_BLOCK, &block, NULL);
  green_t *susp = running;
  suspendCond(suspended);

  if(mutex != NULL){
    mutex->taken = FALSE;
    readyQueue(mutex->suspended);
  }

  green_t *next = running->next;

  running = next;
  swapcontext(susp->context, next->context);

    if(mutex != NULL){
      struct green_t *susp = running;
      while(mutex->taken){
        suspendMutex(mutex);
        struct green_t *next = running->next;
        running = next;
        swapcontext(susp->context, next->context);
      }
      mutex->taken = TRUE;

    }
  sigprocmask(SIG_UNBLOCK, &block, NULL);

}