#include <stddef.h>
#include <mach/mach_types.h>
#include <sys/cdefs.h>
+#include <Availability.h>
__BEGIN_DECLS
/********* Type definitions ************/
struct malloc_introspection_t *introspect;
unsigned version;
+
+ /* aligned memory allocation. The callback may be NULL. Present in version >= 5. */
+ void *(*memalign)(struct _malloc_zone_t *zone, size_t alignment, size_t size);
+
+ /* free a pointer known to be in zone and known to have the given size. The callback may be NULL. Present in version >= 6.*/
+ void (*free_definite_size)(struct _malloc_zone_t *zone, void *ptr, size_t size);
+
+ /* Empty out caches in the face of memory pressure. The callback may be NULL. Present in version >= 8. */
+ size_t (*pressure_relief)(struct _malloc_zone_t *zone, size_t goal);
} malloc_zone_t;
/********* Creation and destruction ************/
/* The initial zone */
extern malloc_zone_t *malloc_create_zone(vm_size_t start_size, unsigned flags);
- /* Create a new zone */
+ /* Creates a new zone with default behavior and registers it */
extern void malloc_destroy_zone(malloc_zone_t *zone);
/* Destroys zone and everything it allocated */
extern size_t malloc_size(const void *ptr);
/* Returns size of given ptr */
+extern size_t malloc_good_size(size_t size);
+ /* Returns number of bytes greater than or equal to size that can be allocated without padding */
+
+extern void *malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_0);
+ /*
+ * Allocates a new pointer of size size whose address is an exact multiple of alignment.
+ * alignment must be a power of two and at least as large as sizeof(void *).
+ * zone must be non-NULL.
+ */
+
/********* Batch methods ************/
extern unsigned malloc_zone_batch_malloc(malloc_zone_t *zone, size_t size, void **results, unsigned num_requested);
extern void malloc_zone_batch_free(malloc_zone_t *zone, void **to_be_freed, unsigned num);
/* frees all the pointers in to_be_freed; note that to_be_freed may be overwritten during the process; This function will always free even if the zone has no batch callback */
+/********* Functions for libcache ************/
+
+extern malloc_zone_t *malloc_default_purgeable_zone(void) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_0);
+ /* Returns a pointer to the default purgeable_zone. */
+
+extern void malloc_make_purgeable(void *ptr) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_0);
+ /* Make an allocation from the purgeable zone purgeable if possible. */
+
+extern int malloc_make_nonpurgeable(void *ptr) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_0);
+ /* Makes an allocation from the purgeable zone nonpurgeable.
+ * Returns zero if the contents were not purged since the last
+ * call to malloc_make_purgeable, else returns non-zero. */
+
/********* Functions for zone implementors ************/
extern void malloc_zone_register(malloc_zone_t *zone);
- /* Registers a freshly created zone;
- Should typically be called after a zone has been created */
+ /* Registers a custom malloc zone; Should typically be called after a
+ * malloc_zone_t has been filled in with custom methods by a client. See
+ * malloc_create_zone for creating additional malloc zones with the
+ * default allocation and free behavior. */
extern void malloc_zone_unregister(malloc_zone_t *zone);
/* De-registers a zone
extern const char *malloc_get_zone_name(malloc_zone_t *zone);
/* Returns the name of a zone */
+size_t malloc_zone_pressure_relief(malloc_zone_t *zone, size_t goal) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+ /* malloc_zone_pressure_relief() advises the malloc subsystem that the process is under memory pressure and
+ * that the subsystem should make its best effort towards releasing (i.e. munmap()-ing) "goal" bytes from "zone".
+ * If "goal" is passed as zero, the malloc subsystem will attempt to achieve maximal pressure relief in "zone".
+ * If "zone" is passed as NULL, all zones are examined for pressure relief opportunities.
+ * malloc_zone_pressure_relief() returns the number of bytes released.
+ */
+
typedef struct {
vm_address_t address;
vm_size_t size;
#define MALLOC_PTR_IN_USE_RANGE_TYPE 1 /* for allocated pointers */
#define MALLOC_PTR_REGION_RANGE_TYPE 2 /* for region containing pointers */
#define MALLOC_ADMIN_REGION_RANGE_TYPE 4 /* for region used internally */
+#define MALLOC_ZONE_SPECIFIC_FLAGS 0xff00 /* bits reserved for zone-specific purposes */
typedef void vm_range_recorder_t(task_t, void *, unsigned type, vm_range_t *, unsigned);
/* given a task and context, "records" the specified addresses */
void (*force_lock)(malloc_zone_t *zone); /* Forces locking zone */
void (*force_unlock)(malloc_zone_t *zone); /* Forces unlocking zone */
void (*statistics)(malloc_zone_t *zone, malloc_statistics_t *stats); /* Fills statistics */
+ boolean_t (*zone_locked)(malloc_zone_t *zone); /* Are any zone locks held */
+
+ /* Discharge checking. Present in version >= 7. */
+ boolean_t (*enable_discharge_checking)(malloc_zone_t *zone);
+ void (*disable_discharge_checking)(malloc_zone_t *zone);
+ void (*discharge)(malloc_zone_t *zone, void *memory);
+#ifdef __BLOCKS__
+ void (*enumerate_discharged_pointers)(malloc_zone_t *zone, void (^report_discharged)(void *memory, void *info));
+#else
+ void *enumerate_unavailable_without_blocks;
+#endif /* __BLOCKS__ */
} malloc_introspection_t;
extern void malloc_printf(const char *format, ...);
extern struct mstats mstats(void);
+extern boolean_t malloc_zone_enable_discharge_checking(malloc_zone_t *zone) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+/* Increment the discharge checking enabled counter for a zone. Returns true if the zone supports checking, false if it does not. */
+
+extern void malloc_zone_disable_discharge_checking(malloc_zone_t *zone) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+/* Decrement the discharge checking enabled counter for a zone. */
+
+extern void malloc_zone_discharge(malloc_zone_t *zone, void *memory) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+/* Register memory that the programmer expects to be freed soon.
+ zone may be NULL in which case the zone is determined using malloc_zone_from_ptr().
+ If discharge checking is off for the zone this function is a no-op. */
+
+#ifdef __BLOCKS__
+extern void malloc_zone_enumerate_discharged_pointers(malloc_zone_t *zone, void (^report_discharged)(void *memory, void *info)) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+/* Calls report_discharged for each block that was registered using malloc_zone_discharge() but has not yet been freed.
+ info is used to provide zone defined information about the memory block.
+ If zone is NULL then the enumeration covers all zones. */
+#else
+extern void malloc_zone_enumerate_discharged_pointers(malloc_zone_t *zone, void *) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+#endif /* __BLOCKS__ */
+
__END_DECLS
#endif /* _MALLOC_MALLOC_H_ */
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