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110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
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/*
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* Copyright (c) 1997 John S. Dyson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Absolutely no warranty of function or purpose is made by the author
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* John S. Dyson.
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* 4. This work was done expressly for inclusion into FreeBSD. Other use
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* is allowed if this notation is included.
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* 5. Modifications may be freely made to this file if the above conditions
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* are met.
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*
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* $Id$
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*/
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#if !defined(_SYS_ZONE_H)
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#define _SYS_ZONE_H
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#define ZONE_INTERRUPT 1 /* Use this if you need to allocate at int time */
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#define ZONE_BOOT 16 /* This is an internal flag used by zbootinit */
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#include <machine/param.h>
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#include <sys/lock.h>
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typedef struct vm_zone {
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struct simplelock zlock; /* lock for data structure */
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void *zitems; /* linked list of items */
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int zfreecnt; /* free entries */
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int zfreemin; /* minimum number of free entries */
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vm_offset_t zkva; /* Base kva of zone */
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int zpagecount; /* Total # of allocated pages */
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int zpagemax; /* Max address space */
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int zsize; /* size of each entry */
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int zalloc; /* hint for # of pages to alloc */
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int zflags; /* flags for zone */
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int zallocflag; /* flag for allocation */
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struct vm_object *zobj; /* object to hold zone */
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char *zname; /* name for diags */
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} *vm_zone_t;
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vm_zone_t zinit(char *name, int size, int nentries, int flags, int zalloc);
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int zinitna(vm_zone_t z, struct vm_object *obj, char *name, int size,
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int nentries, int flags, int zalloc);
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static void * zalloc(vm_zone_t z);
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static void zfree(vm_zone_t z, void *item);
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void * zalloci(vm_zone_t z) __attribute__((regparm(1)));
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void zfreei(vm_zone_t z, void *item) __attribute__((regparm(2)));
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void zbootinit(vm_zone_t z, char *name, int size, void *item, int nitems) ;
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void * _zget(vm_zone_t z) __attribute__((regparm(1)));
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/*
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* void *zalloc(vm_zone_t zone) --
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* Returns an item from a specified zone.
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*
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* void zfree(vm_zone_t zone, void *item) --
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* Frees an item back to a specified zone.
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*/
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static __inline__ void *
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_zalloc(vm_zone_t z) {
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void *item;
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if (z->zfreecnt <= z->zfreemin) {
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return _zget(z);
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}
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item = z->zitems;
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z->zitems = *(void **) item;
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z->zfreecnt--;
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return item;
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}
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static __inline__ void
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_zfree(vm_zone_t z, void *item) {
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* (void **) item = z->zitems;
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z->zitems = item;
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z->zfreecnt++;
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}
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static __inline__ void *
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zalloc(vm_zone_t z) {
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#if NCPU > 1
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return zalloci(z);
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#else
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return _zalloc(z);
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#endif
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}
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static __inline__ void
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zfree(vm_zone_t z, void *item) {
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#if NCPU > 1
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zfreei(z, item);
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#else
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_zfree(z, item);
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#endif
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}
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#endif
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