osfmk/kern/zalloc.h

90  *	A zone is a collection of fixed size blocks for which there
92  *	use zones to manage data structures dynamically, creating a zone
100 struct zone {
103 		queue_head_t			any_free_foreign;	/* foreign pages crammed into zone */
110 	lck_attr_t      lock_attr;	/* zone lock attribute */
111 	decl_lck_mtx_data(,lock)	/* zone lock */
114 	vm_size_t	max_size;	/* how large can this zone grow */
117 	uint64_t	page_count __attribute__((aligned(8)));   /* number of pages used by this zone */
118 	uint64_t	sum_count;	/* count of allocs (life of zone) */
122 	/* boolean_t */	expandable         :1,	/* (T) expand zone (with message)? */
124 	/* boolean_t */	doing_alloc        :1,	/* is zone expanding now? */
138 	int		index;		/* index into zone_info arrays for this zone */
139 	struct zone	*next_zone;	/* Link for all-zones list */
140 	const char	*zone_name;	/* a name for the zone */
146 	uint32_t zleak_capture;		/* per-zone counter for capturing every N allocations */
157  *	structure for tracking zone usage
158  *	Used either one per task/thread for all zones or <per-task,per-zone>.
170 /* Steal memory for zone module */
173 /* Bootstrap zone module (create zone zone) */
176 /* Init zone module */
180 /* Handle per-task zone info */
217 /* Allocate from zone */
219 					zone_t		zone);
221 /* Free zone element */
223 					zone_t		zone,
226 /* Create zone */
231 					const char	*name);		/* a name for the zone */
236 					zone_t		zone);
240 					zone_t		zone,
243 /* Get from zone free list */
245 					zone_t		zone);
247 /* Fill zone with memory */
249 					zone_t		zone,
253 /* Initially fill zone with specified number of elements */
255 					zone_t		zone,
258 /* Change zone parameters */
260 					zone_t			zone,
265 #define Z_EXHAUST	1	/* Make zone exhaustible	*/
266 #define Z_COLLECT	2	/* Make zone collectable	*/
267 #define Z_EXPAND	3	/* Make zone expandable		*/
268 #define	Z_FOREIGN	4	/* Allow collectable zone to contain foreign elements */
270 #define Z_NOENCRYPT	6	/* Don't encrypt zone during hibernation */
271 #define Z_NOCALLOUT 	7	/* Don't asynchronously replenish the zone via
277 /* Preallocate space for zone from zone map */
279 					zone_t		zone,
283 						zone_t		zone);
286  * MAX_ZTRACE_DEPTH configures how deep of a stack trace is taken on each zalloc in the zone of interest.  15
290  * This is used both for the zone leak detector and the zone corruption log.
327 #define lock_zone(zone)					\
329 	lck_mtx_lock_spin(&(zone)->lock);		\
332 #define unlock_zone(zone)				\
334 	lck_mtx_unlock(&(zone)->lock);			\