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The functions CBSInsert, CBSDelete and CBSFind* now additionally return an "old" address range which gives the former base and limit of the block that has just been updated. This gives clients enough information to update their caches if need be. Update CBS test and design accordingly. Copied from Perforce Change: 182014 ServerID: perforce.ravenbrook.com
110 lines
4.3 KiB
C
110 lines
4.3 KiB
C
/* cbs.h: CBS -- Coalescing Block Structure
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*
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* $Id$
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* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
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*
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* .source: <design/cbs/>.
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*/
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#ifndef cbs_h
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#define cbs_h
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#include "meter.h"
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#include "splay.h"
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#include "mpmtypes.h"
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typedef struct CBSStruct *CBS;
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typedef Bool (*CBSIterateMethod)(CBS cbs, Addr base, Addr limit, void *closureP);
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#define CBSSig ((Sig)0x519CB599) /* SIGnature CBS */
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typedef struct CBSStruct {
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SplayTreeStruct splayTree;
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Count splayTreeSize;
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Pool blockPool;
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Align alignment;
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Bool fastFind;
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Bool inCBS; /* prevent reentrance */
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/* meters for sizes of search structures at each op */
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METER_DECL(splaySearch);
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Sig sig; /* sig at end because embeded */
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} CBSStruct;
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extern Bool CBSCheck(CBS cbs);
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extern Res CBSInit(Arena arena, CBS cbs, void *owner,
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Align alignment, Bool fastFind);
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extern void CBSFinish(CBS cbs);
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extern Res CBSInsert(Addr *baseReturn, Addr *limitReturn,
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CBS cbs, Addr base, Addr limit);
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extern Res CBSDelete(Addr *baseReturn, Addr *limitReturn,
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CBS cbs, Addr base, Addr limit);
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extern void CBSIterate(CBS cbs, CBSIterateMethod iterate, void *closureP);
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extern Res CBSDescribe(CBS cbs, mps_lib_FILE *stream);
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typedef unsigned CBSFindDelete;
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enum {
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CBSFindDeleteNONE = 1,/* don't delete after finding */
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CBSFindDeleteLOW, /* delete precise size from low end */
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CBSFindDeleteHIGH, /* delete precise size from high end */
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CBSFindDeleteENTIRE /* delete entire range */
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};
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extern Bool CBSFindFirst(Addr *baseReturn, Addr *limitReturn,
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Addr *oldBaseReturn, Addr *oldLimitReturn,
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CBS cbs, Size size, CBSFindDelete findDelete);
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extern Bool CBSFindLast(Addr *baseReturn, Addr *limitReturn,
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Addr *oldBaseReturn, Addr *oldLimitReturn,
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CBS cbs, Size size, CBSFindDelete findDelete);
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extern Bool CBSFindLargest(Addr *baseReturn, Addr *limitReturn,
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Addr *oldBaseReturn, Addr *oldLimitReturn,
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CBS cbs, CBSFindDelete findDelete);
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#endif /* cbs_h */
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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