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- /*
- * devDiskStats.h --
- *
- * Declarations of routines for collecting statistics on Sprite disk
- * usage.
- *
- * Copyright 1989 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- *
- * $Header: /cdrom/src/kernel/Cvsroot/kernel/dev/devDiskStats.h,v 9.3 91/04/16 17:12:54 jhh Exp $ SPRITE (Berkeley)
- */
-
- #ifndef _DISKSTATS
- #define _DISKSTATS
-
- #include <user/sysStats.h>
- #include <user/fs.h>
-
- /*
- * This structure is used for disk stats instead of a straignt Sys_DiskStats
- * because otherwise for some types of disks (SCSI), there is no place to
- * keep the busy info. This field is wasted on the xylogics.
- */
- typedef struct DevDiskStats {
- Sync_Semaphore mutex; /* syncrhonize stat updates */
- int busy; /* For idle check. */
- Sys_DiskStats diskStats; /* Stat structure of device. */
- } DevDiskStats;
-
-
- /* procedures */
-
- extern DevDiskStats *DevRegisterDisk _ARGS_((Fs_Device *devicePtr,
- char *deviceName,
- Boolean (*idleCheck) _ARGS_ ((ClientData clientData,
- DevDiskStats *diskStatsPtr)),
- ClientData clientData));
- extern void DevDiskUnregister _ARGS_((DevDiskStats *diskStatsPtr));
- extern void DevPrintIOStats _ARGS_((Timer_Ticks time, ClientData clientData));
- extern void Dev_StartIOStats _ARGS_((void));
- extern void Dev_StopIOStats _ARGS_((void));
-
- #endif /* _DISKSTATS */
-
-