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Diffstat (limited to 'kern/zalloc.h')
| -rw-r--r-- | kern/zalloc.h | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/kern/zalloc.h b/kern/zalloc.h deleted file mode 100644 index f1a1850..0000000 --- a/kern/zalloc.h +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University. - * Copyright (c) 1993,1994 The University of Utah and - * the Computer Systems Laboratory (CSL). - * 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, THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF - * THIS SOFTWARE IN ITS "AS IS" CONDITION, AND DISCLAIM 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 - * - */ - -#ifndef _KERN_ZALLOC_H_ -#define _KERN_ZALLOC_H_ - -#include <mach/machine/vm_types.h> -#include <kern/macro_help.h> -#include <kern/lock.h> -#include <kern/queue.h> -#include <machine/zalloc.h> - -/* - * 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 { - decl_simple_lock_data(,lock) /* generic lock */ -#ifdef ZONE_COUNT - int count; /* Number of elements used now */ -#endif - vm_offset_t free_elements; - 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 align; /* alignment of elements */ - vm_size_t alloc_size; /* size used for more memory */ - boolean_t doing_alloc; /* is zone expanding now? */ - char *zone_name; /* a name for the zone */ - unsigned int type; /* type of memory */ - lock_data_t complex_lock; /* Lock for pageable zones */ - struct zone *next_zone; /* Link for all-zones list */ -}; -typedef struct zone *zone_t; - -#define ZONE_NULL ((zone_t) 0) - -/* Exported to everyone */ -zone_t zinit(vm_size_t size, vm_size_t align, vm_size_t max, - vm_size_t alloc, unsigned int memtype, char *name); -vm_offset_t zalloc(zone_t zone); -vm_offset_t zget(zone_t zone); -void zfree(zone_t zone, vm_offset_t elem); -void zcram(zone_t zone, vm_offset_t newmem, vm_size_t size); - -/* Exported only to vm/vm_init.c */ -void zone_bootstrap(void); -void zone_init(void); - -/* Exported only to vm/vm_pageout.c */ -void consider_zone_gc(void); - - -/* Memory type bits for zones */ -#define ZONE_PAGEABLE 0x00000001 -#define ZONE_COLLECTABLE 0x00000002 /* Garbage-collect this zone when memory runs low */ -#define ZONE_EXHAUSTIBLE 0x00000004 /* zalloc() on this zone is allowed to fail */ -#define ZONE_FIXED 0x00000008 /* Panic if zone is exhausted (XXX) */ - -/* Machine-dependent code can provide additional memory types. */ -#define ZONE_MACHINE_TYPES 0xffff0000 - - -#ifdef ZONE_COUNT -#define zone_count_up(zone) ((zone)->count++) -#define zone_count_down(zone) ((zone)->count--) -#else -#define zone_count_up(zone) -#define zone_count_down(zone) -#endif - - - -/* These quick inline versions only work for small, nonpageable zones (currently). */ - -static __inline vm_offset_t ZALLOC(zone_t zone) -{ - simple_lock(&zone->lock); - if (zone->free_elements == 0) { - simple_unlock(&zone->lock); - return zalloc(zone); - } else { - vm_offset_t element = zone->free_elements; - zone->free_elements = *((vm_offset_t *)(element)); - zone_count_up(zone); - simple_unlock(&zone->lock); - return element; - } -} - -static __inline void ZFREE(zone_t zone, vm_offset_t element) -{ - *((vm_offset_t *)(element)) = zone->free_elements; - zone->free_elements = (vm_offset_t) (element); - zone_count_down(zone); -} - - - -#endif /* _KERN_ZALLOC_H_ */ |