65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
/* $NetBSD: rf_callback.h,v 1.3 1999/02/05 00:06:06 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*****************************************************************************************
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*
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* callback.h -- header file for callback.c
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*
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* the reconstruction code must manage concurrent I/Os on multiple drives.
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* it sometimes needs to suspend operation on a particular drive until some
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* condition occurs. we can't block the thread, of course, or we wouldn't
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* be able to manage our other outstanding I/Os. Instead we just suspend
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* new activity on the indicated disk, and create a callback descriptor and
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* put it someplace where it will get invoked when the condition that's
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* stalling us has cleared. When the descriptor is invoked, it will call
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* a function that will restart operation on the indicated disk.
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*
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****************************************************************************************/
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#ifndef _RF__RF_CALLBACK_H_
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#define _RF__RF_CALLBACK_H_
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#include "rf_types.h"
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struct RF_CallbackDesc_s {
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void (*callbackFunc) (RF_CBParam_t); /* function to call */
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RF_CBParam_t callbackArg; /* args to give to function, or just
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* info about this callback */
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RF_CBParam_t callbackArg2;
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RF_RowCol_t row; /* disk row and column IDs to give to the
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* callback func */
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RF_RowCol_t col;
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RF_CallbackDesc_t *next;/* next entry in list */
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};
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int rf_ConfigureCallback(RF_ShutdownList_t ** listp);
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RF_CallbackDesc_t *rf_AllocCallbackDesc(void);
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void rf_FreeCallbackDesc(RF_CallbackDesc_t * p);
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#endif /* !_RF__RF_CALLBACK_H_ */
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