vm_map_store.h   [plain text]

/*
 * Copyright (c) 2009 Apple 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@
 */

#ifndef _VM_VM_MAP_STORE_H
#define _VM_VM_MAP_STORE_H

/*
#ifndef VM_MAP_STORE_USE_LL
#define VM_MAP_STORE_USE_LL
#endif
*/
#ifndef VM_MAP_STORE_USE_RB
#define VM_MAP_STORE_USE_RB
#endif

#include <libkern/tree.h>

struct _vm_map;
struct vm_map_entry;
struct vm_map_copy;
struct vm_map_header;

struct vm_map_store {
#ifdef VM_MAP_STORE_USE_RB
	RB_ENTRY(vm_map_store) entry;
#endif
};

#ifdef VM_MAP_STORE_USE_RB
	RB_HEAD( rb_head, vm_map_store );
#endif

#include <vm/vm_map.h>
#include <vm/vm_map_store_ll.h>
#include <vm/vm_map_store_rb.h>

#define UPDATE_HIGHEST_ENTRY_END(map, highest_entry)	 			\
	MACRO_BEGIN								\
	struct _vm_map*	UHEE_map; 						\
	struct vm_map_entry*	UHEE_entry; 						\
	UHEE_map = (map); 							\
	UHEE_entry = (highest_entry);	 					\
	if( UHEE_map->highest_entry_end < UHEE_entry->vme_end) { 		\
		UHEE_map->highest_entry_end = UHEE_entry->vme_end;		\
	}								\
	MACRO_END

#define	VM_MAP_HIGHEST_ENTRY(map, entry, start)					\
	MACRO_BEGIN								\
	struct _vm_map* VMHE_map;							\
	struct vm_map_entry*	tmp_entry;						\
	vm_map_offset_t VMHE_start;						\
	VMHE_map = (map);							\
	VMHE_start= VMHE_map->highest_entry_end + PAGE_SIZE_64;			\
	while(vm_map_lookup_entry(VMHE_map, VMHE_start, &tmp_entry)){		\
		VMHE_map->highest_entry_end = tmp_entry->vme_end;		\
		VMHE_start = VMHE_map->highest_entry_end + PAGE_SIZE_64;	\
	}									\
	entry = tmp_entry;							\
	start = VMHE_start;							\
	MACRO_END

/*
 *	SAVE_HINT_MAP_READ:
 *
 *	Saves the specified entry as the hint for
 *	future lookups.  only a read lock is held on map,
 * 	so make sure the store is atomic... OSCompareAndSwap
 *	guarantees this... also, we don't care if we collide
 *	and someone else wins and stores their 'hint'
 */
#define	SAVE_HINT_MAP_READ(map,value) \
	MACRO_BEGIN							\
	OSCompareAndSwapPtr((map)->hint, value, &(map)->hint); \
	MACRO_END


/*
 *	SAVE_HINT_MAP_WRITE:
 *
 *	Saves the specified entry as the hint for
 *	future lookups.  write lock held on map,
 * 	so no one else can be writing or looking
 * 	until the lock is dropped, so it's safe
 * 	to just do an assignment
 */
#define	SAVE_HINT_MAP_WRITE(map,value) \
	MACRO_BEGIN		       \
	(map)->hint = (value);	       \
	MACRO_END

#define VM_MAP_ENTRY_CREATE	1
#define VM_MAP_ENTRY_DELETE	2

void vm_map_store_init( struct vm_map_header*  );
boolean_t vm_map_store_lookup_entry( struct _vm_map*, vm_map_offset_t, struct vm_map_entry**);
void	vm_map_store_update( struct _vm_map*, struct vm_map_entry*, int);
void 	_vm_map_store_entry_link( struct vm_map_header *, struct vm_map_entry*, struct vm_map_entry*);
void 	vm_map_store_entry_link( struct _vm_map*, struct vm_map_entry*, struct vm_map_entry*);
void	_vm_map_store_entry_unlink( struct vm_map_header *, struct vm_map_entry*);
void	vm_map_store_entry_unlink( struct _vm_map*, struct vm_map_entry*);
void	vm_map_store_update_first_free( struct _vm_map*, struct vm_map_entry*);
void	vm_map_store_copy_insert( struct _vm_map*, struct vm_map_entry*, struct vm_map_copy*);
void	vm_map_store_copy_reset( struct vm_map_copy*, struct vm_map_entry*);
#if MACH_ASSERT
boolean_t first_free_is_valid_store( struct _vm_map*);
#endif

#endif /* _VM_VM_MAP_STORE_H */