system/kernel/condition_variable.cpp

54 	: fVariable(NULL)
61 	// We can use an "unsafe" non-atomic access of fVariable here, since we only
63 	if (fVariable != NULL)
95 	return atomic_pointer_get(&fVariable);
102 	ASSERT(fVariable == NULL);
105 	fVariable = variable;
107 	fVariable->fEntries.Add(this);
108 	atomic_add(&fVariable->fEntriesCount, 1);
119 	ConditionVariable* variable = atomic_pointer_get(&fVariable);
123 		// We thus cannot access fVariable, and must spin until it is cleared.
125 		while (atomic_pointer_get(&fVariable) != NULL) {
136 		if (atomic_pointer_get(&fVariable) == NULL) {
143 		// the try_acquire in which the variable might clear out our fVariable.
153 	if (fVariable->fEntries.Contains(this))
154 		fVariable->fEntries.Remove(this);
156 	atomic_pointer_set(&fVariable, (ConditionVariable*)NULL);
168 			"disabled, entry: %p, variable: %p", this, fVariable);
173 	ConditionVariable* variable = atomic_pointer_get(&fVariable);
395 			atomic_pointer_set(&entry->fVariable, (ConditionVariable*)NULL);
412 				// in case it tries to re-block itself immediately after we unset fVariable.
419 			// (We may not validly access the entry once we unset its fVariable.)
420 			atomic_pointer_set(&entry->fVariable, (ConditionVariable*)NULL);
424 			// fVariable, because otherwise it will wake up before thread_unblock returns