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56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
/*
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* PROGRAM: JRD Access Method
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* MODULE: pag.h
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* DESCRIPTION: Page interface definitions
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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/*
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* Modified by: Patrick J. P. Griffin
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* Date: 11/29/2000
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* Problem: Bug 116733 Too many generators corrupt database.
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* DPM_gen_id was not calculating page and offset correctly.
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* Change: Add pgc_gpg, number of generators per page,
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* for use in DPM_gen_id.
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*/
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#ifndef _JRD_PAG_H_
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#define _JRD_PAG_H_
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#include "../jrd/jrd_blks.h"
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#include "../include/fb_blk.h"
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/* Page control block -- used by PAG to keep track of critical
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constants */
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class pgc : public pool_alloc<type_pgc>
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{
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public:
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SLONG pgc_high_water; /* Lowest PIP with space */
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SLONG pgc_ppp; /* Pages per pip */
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SLONG pgc_pip; /* First pointer page */
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ULONG pgc_bytes; /* Number of bytes of bit in PIP */
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ULONG pgc_tpt; /* Transactions per TIP */
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ULONG pgc_gpg; /* Generators per generator page */
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};
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typedef pgc *PGC;
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#endif /* _JRD_PAG_H_ */
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