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Update thread_recalculate_priority to disable interrupts preventing race conditions for access to donors and priorities w/ S

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Themis Demetriades
2024-10-23 16:16:25 +01:00
parent 25ca7b6522
commit f9d82c92de
1 changed files with 3 additions and 0 deletions
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3
src/threads/thread.c
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@@ -417,6 +417,8 @@ void
thread_recalculate_priority (void) thread_recalculate_priority (void)
{ {
struct thread *t = thread_current (); struct thread *t = thread_current ();
enum intr_level old_level = intr_disable ();
t->priority = t->base_priority; t->priority = t->base_priority;
/* If there are no donors to the current thread, then the effective /* If there are no donors to the current thread, then the effective
@@ -432,6 +434,7 @@ thread_recalculate_priority (void)
if (max_donated_priority > t->priority) if (max_donated_priority > t->priority)
t->priority = max_donated_priority; t->priority = max_donated_priority;
} }
intr_set_level (old_level);
} }
/* Sets the current thread's nice value to NICE. */ /* Sets the current thread's nice value to NICE. */