/* * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * File: zalloc.h * Author: Avadis Tevanian, Jr. * Date: 1985 * */ #ifdef KERNEL_PRIVATE #ifndef _KERN_ZALLOC_H_ #define _KERN_ZALLOC_H_ #include #include #include #ifdef MACH_KERNEL_PRIVATE #include #include #include #include #include #include /* * A zone is a collection of fixed size blocks for which there * is fast allocation/deallocation access. Kernel routines can * use zones to manage data structures dynamically, creating a zone * for each type of data structure to be managed. * */ struct zone { int count; /* Number of elements used now */ vm_offset_t free_elements; decl_lck_mtx_data(,lock) /* zone lock */ lck_mtx_ext_t lock_ext; /* placeholder for indirect mutex */ lck_attr_t lock_attr; /* zone lock attribute */ lck_grp_t lock_grp; /* zone lock group */ lck_grp_attr_t lock_grp_attr; /* zone lock group attribute */ vm_size_t cur_size; /* current memory utilization */ vm_size_t max_size; /* how large can this zone grow */ vm_size_t elem_size; /* size of an element */ vm_size_t alloc_size; /* size used for more memory */ unsigned int /* boolean_t */ exhaustible :1, /* (F) merely return if empty? */ /* boolean_t */ collectable :1, /* (F) garbage collect empty pages */ /* boolean_t */ expandable :1, /* (T) expand zone (with message)? */ /* boolean_t */ allows_foreign :1,/* (F) allow non-zalloc space */ /* boolean_t */ doing_alloc :1, /* is zone expanding now? */ /* boolean_t */ waiting :1, /* is thread waiting for expansion? */ /* boolean_t */ async_pending :1, /* asynchronous allocation pending? */ /* boolean_t */ doing_gc :1; /* garbage collect in progress? */ struct zone * next_zone; /* Link for all-zones list */ call_entry_data_t call_async_alloc; /* callout for asynchronous alloc */ const char *zone_name; /* a name for the zone */ #if ZONE_DEBUG queue_head_t active_zones; /* active elements */ #endif /* ZONE_DEBUG */ }; extern void zone_gc(void); extern void consider_zone_gc(void); /* Steal memory for zone module */ extern void zone_steal_memory(void); /* Bootstrap zone module (create zone zone) */ extern void zone_bootstrap(void) __attribute__((section("__TEXT, initcode"))); /* Init zone module */ extern void zone_init( vm_size_t map_size) __attribute__((section("__TEXT, initcode"))); /* Stack use statistics */ extern void stack_fake_zone_info( int *count, vm_size_t *cur_size, vm_size_t *max_size, vm_size_t *elem_size, vm_size_t *alloc_size, int *collectable, int *exhaustable); #if ZONE_DEBUG #if MACH_KDB extern void * next_element( zone_t z, void *elt); extern void * first_element( zone_t z); #endif /* MACH_KDB */ extern void zone_debug_enable( zone_t z); extern void zone_debug_disable( zone_t z); #endif /* ZONE_DEBUG */ #endif /* MACH_KERNEL_PRIVATE */ __BEGIN_DECLS #ifdef XNU_KERNEL_PRIVATE /* Allocate from zone */ extern void * zalloc( zone_t zone); /* Free zone element */ extern void zfree( zone_t zone, void *elem); /* Create zone */ extern zone_t zinit( vm_size_t size, /* the size of an element */ vm_size_t maxmem, /* maximum memory to use */ vm_size_t alloc, /* allocation size */ const char *name); /* a name for the zone */ /* Non-blocking version of zalloc */ extern void * zalloc_noblock( zone_t zone); /* direct (non-wrappered) interface */ extern void * zalloc_canblock( zone_t zone, boolean_t canblock); /* Get from zone free list */ extern void * zget( zone_t zone); /* Fill zone with memory */ extern void zcram( zone_t zone, void *newmem, vm_size_t size); /* Initially fill zone with specified number of elements */ extern int zfill( zone_t zone, int nelem); /* Change zone parameters */ extern void zone_change( zone_t zone, unsigned int item, boolean_t value); /* Item definitions */ #define Z_EXHAUST 1 /* Make zone exhaustible */ #define Z_COLLECT 2 /* Make zone collectable */ #define Z_EXPAND 3 /* Make zone expandable */ #define Z_FOREIGN 4 /* Allow collectable zone to contain foreign elements */ /* Preallocate space for zone from zone map */ extern void zprealloc( zone_t zone, vm_size_t size); extern integer_t zone_free_count( zone_t zone); #endif /* XNU_KERNEL_PRIVATE */ __END_DECLS #endif /* _KERN_ZALLOC_H_ */ #endif /* KERNEL_PRIVATE */