~pintos/src/threads/thread.c
Changed methods:
thread_priority_temporarily_up(void) :
Here, we create a pointer to the current thread and make the priority of the thread as 63, which in fact is the highest priority.
thread_priority_restore(void)
We revert back the priority by making the priority of the thread as stored priority. Stored priority is a new element in the thread structure.
thread_block_till(int64_t wakeup)
We first disable the interrupts, assert if the thread is running and then make the sleep_tics of the thread equal to wakeup value.
We insert the thread in the sleeper list, then we block the thread and resume the interrupts.