[unix-history] / usr / src / sys / vm / device_pager.h

/*
 * Copyright (c) 1990 University of Utah.
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)device_pager.h	7.2 (Berkeley) %G%
 */

#ifndef	_DEVICE_PAGER_
#define	_DEVICE_PAGER_	1

/*
 * Device pager private data.
 */
struct devpager {
	queue_head_t	devp_list;	/* list of managed devices */
	dev_t		devp_dev;	/* devno of device */
	vm_page_t	devp_pages;	/* page structs for device */
	int		devp_npages;	/* size of device in pages */
	int		devp_count;	/* reference count */
	vm_object_t	devp_object;	/* object representing this device */
};
typedef struct devpager	*dev_pager_t;

#define DEV_PAGER_NULL	((dev_pager_t)0)

#endif	/* _DEVICE_PAGER_ */
Commit	Line	Data
619edcce KM	1	/*
	2	* Copyright (c) 1990 University of Utah.
	3	* Copyright (c) 1991 The Regents of the University of California.
	4	* All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* the Systems Programming Group of the University of Utah Computer
	8	* Science Department.
	9	*
	10	* %sccs.include.redist.c%
	11	*
829cdc84	12	* @(#)device_pager.h 7.2 (Berkeley) %G%
619edcce KM	13	*/
	14
	15	#ifndef _DEVICE_PAGER_
	16	#define _DEVICE_PAGER_ 1
	17
	18	/*
	19	* Device pager private data.
	20	*/
	21	struct devpager {
	22	queue_head_t devp_list; /* list of managed devices */
	23	dev_t devp_dev; /* devno of device */
	24	vm_page_t devp_pages; /* page structs for device */
	25	int devp_npages; /* size of device in pages */
	26	int devp_count; /* reference count */
	27	vm_object_t devp_object; /* object representing this device */
	28	};
	29	typedef struct devpager *dev_pager_t;
	30
	31	#define DEV_PAGER_NULL ((dev_pager_t)0)
	32
619edcce	33	#endif /* _DEVICE_PAGER_ */