Imperial-MEng/pintos_22
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Merge 'task1/priority-donation' into 'master' #14

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sb3923 merged 66 commits from task1/priority-donation into master 2024-10-23 16:15:45 +00:00
Conversation 35 Commits 66 Files Changed 4 +59 -2
2 changed files with 59 additions and 2 deletions
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src/threads/thread.c
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@@ -389,6 +389,8 @@ thread_set_priority (int new_priority)
thread_current ()->priority = new_priority; thread_current ()->priority = new_priority;
enum intr_level old_level = intr_disable ();
if (new_priority < old_priority && !list_empty (&ready_list)) { if (new_priority < old_priority && !list_empty (&ready_list)) {
/* If the new priority is lower than the old priority, check if the current /* If the new priority is lower than the old priority, check if the current
thread no longer has the highest priority. If it doesn't, yield the CPU. thread no longer has the highest priority. If it doesn't, yield the CPU.
@@ -401,6 +403,8 @@ thread_set_priority (int new_priority)
thread_yield(); thread_yield();
} }
} }
intr_set_level (old_level);
} }
/* Returns the current thread's priority. */ /* Returns the current thread's priority. */