kernel/thread: Expand documentation of nominal_priority and current_priority
Aims to disambiguate why each priority instance exists a little bit. While we're at it, also add an explanatory comment to UpdatePriority().
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@ -303,7 +303,9 @@ void Thread::RemoveMutexWaiter(SharedPtr<Thread> thread) {
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}
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void Thread::UpdatePriority() {
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// Find the highest priority among all the threads that are waiting for this thread's lock
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// If any of the threads waiting on the mutex have a higher priority
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// (taking into account priority inheritance), then this thread inherits
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// that thread's priority.
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u32 new_priority = nominal_priority;
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if (!wait_mutex_threads.empty()) {
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if (wait_mutex_threads.front()->current_priority < new_priority) {
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@ -398,8 +398,14 @@ private:
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VAddr entry_point = 0;
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VAddr stack_top = 0;
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u32 nominal_priority = 0; ///< Nominal thread priority, as set by the emulated application
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u32 current_priority = 0; ///< Current thread priority, can be temporarily changed
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/// Nominal thread priority, as set by the emulated application.
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/// The nominal priority is the thread priority without priority
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/// inheritance taken into account.
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u32 nominal_priority = 0;
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/// Current thread priority. This may change over the course of the
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/// thread's lifetime in order to facilitate priority inheritance.
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u32 current_priority = 0;
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u64 total_cpu_time_ticks = 0; ///< Total CPU running ticks.
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u64 last_running_ticks = 0; ///< CPU tick when thread was last running
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