/* $NetBSD: rf_callback.h,v 1.8 2021/07/23 00:54:45 oster Exp $ */

/* $NetBSD: rf_callback.h,v 1.8 2021/07/23 00:54:45 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* 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 ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS 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 [email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/

/*****************************************************************************************
*
* callback.h -- header file for callback.c
*
* the reconstruction code must manage concurrent I/Os on multiple drives.
* it sometimes needs to suspend operation on a particular drive until some
* condition occurs. we can't block the thread, of course, or we wouldn't
* be able to manage our other outstanding I/Os. Instead we just suspend
* new activity on the indicated disk, and create a callback descriptor and
* put it someplace where it will get invoked when the condition that's
* stalling us has cleared. When the descriptor is invoked, it will call
* a function that will restart operation on the indicated disk.
*
****************************************************************************************/

#ifndef _RF__RF_CALLBACK_H_
#define _RF__RF_CALLBACK_H_

#include <dev/raidframe/raidframevar.h>

struct RF_CallbackFuncDesc_s {
void (*callbackFunc) (void *); /* function to call */
void *callbackArg; /* args to give to function, or just
* info about this callback */
RF_CallbackFuncDesc_t *next;/* next entry in list */
};

struct RF_CallbackValueDesc_s {
RF_uint64 v;
RF_RowCol_t col; /* column IDs to give to the callback func */
RF_CallbackValueDesc_t *next;/* next entry in list */
};

int rf_ConfigureCallback(RF_ShutdownList_t ** listp, RF_Raid_t *raidPtr,
RF_Config_t *cfgPtr);
RF_CallbackFuncDesc_t *rf_AllocCallbackFuncDesc(RF_Raid_t *raidPtr);
void rf_FreeCallbackFuncDesc(RF_Raid_t *raidPtr, RF_CallbackFuncDesc_t * p);
RF_CallbackValueDesc_t *rf_AllocCallbackValueDesc(RF_Raid_t *raidPtr);
void rf_FreeCallbackValueDesc(RF_Raid_t *raidPtr, RF_CallbackValueDesc_t * p);

#endif /* !_RF__RF_CALLBACK_H_ */