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Refactor thread recalculate priority to add comments for clarity, w/ T

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sBubshait
2024-10-22 20:52:52 +01:00
parent bf6104200c
commit 5549b9c0cb
1 changed files with 4 additions and 0 deletions
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4
src/threads/thread.c
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@@ -419,12 +419,16 @@ thread_recalculate_priority (void)
struct thread *t = thread_current (); struct thread *t = thread_current ();
t->priority = t->base_priority; t->priority = t->base_priority;
/* If there are no donors to the current thread, then the effective
priority is just the base priority. */
if (!list_empty (&t->donors_list)) if (!list_empty (&t->donors_list))
{ {
int max_donated_priority = int max_donated_priority =
list_entry (list_max (&t->donors_list, donor_priority_less, NULL), list_entry (list_max (&t->donors_list, donor_priority_less, NULL),
struct thread, donor_elem)->priority; struct thread, donor_elem)->priority;
/* The effective priority is the max donated priority if this is
higher than the base priority. */
if (max_donated_priority > t->priority) if (max_donated_priority > t->priority)
t->priority = max_donated_priority; t->priority = max_donated_priority;
} }