osfmk/vm/vm_object.c

2331  * For further convenience, we also use negative logic for the page state in the bit map.
2459  * page modified state from the pmap.  Update the chunk_state as we go along.  The caller must specify
2646 	 * range of pages yet, so initialize the state to indicate no pages processed yet.
4770 		 *	its state since vm_object_collapse will
5967  * state of a purgeable object.  A purgeable object is created via a call to
5976  * A purgeable object may be put into a "volatile" state which will make the
5993  * be returned as the old state of the purgeable object (see
6002  * Finally, the current state (non-volatile, volatile, volatile & empty) of a
6016  * state is used to set the new state of the purgeable object and return its
6017  * old state.  For VM_PURGABLE_GET_STATE, the current state of the purgeable
6018  * object is returned in the parameter state.
6020  * The in/out parameter state may be one of VM_PURGABLE_NONVOLATILE,
6023  * Setting the state of a purgeable object to VM_PURGABLE_EMPTY will
6029  * previous state is atomic.  Thus, if a purgeable object is made
6030  * VM_PURGABLE_NONVOLATILE and the old state is returned as
6033  * again.  If the old state is returned as VM_PURGABLE_EMPTY then the object
6034  * was reclaimed while it was in a volatile state and its previous contents
6044 	int		*state)
6057 	 * Get current state of the purgeable object.
6071 		*state = old_state;
6075 	if ((*state) & VM_PURGABLE_DEBUG_EMPTY) {
6078 	if ((*state) & VM_PURGABLE_DEBUG_FAULT) {
6082 	new_state = *state & VM_PURGABLE_STATE_MASK;
6153 		if ((*state&VM_PURGABLE_ORDERING_MASK) == VM_PURGABLE_ORDERING_OBSOLETE)
6156 		        if ((*state&VM_PURGABLE_BEHAVIOR_MASK) == VM_PURGABLE_BEHAVIOR_FIFO)
6221 		vm_purgeable_object_add(object, queue, (*state&VM_VOLATILE_GROUP_MASK)>>VM_VOLATILE_GROUP_SHIFT );
6267 	*state = old_state;
7092  * Allow manipulation of individual page state.  This is actually part of
7168 			/* convention and attempts to change page state */
7249  * level state to be returned from the call.  Page_op was created to provide
7253  * state handling allows the caller to avoid the overhead of the upl structures.
7303 					 * state may have changed while we slept