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cd4a12047f
This doesn't work because the splay tree can't cope with homing in on a node (that appears big enough) then being told that it isn't suitable (because it doesn't have space in the right zone). The splay tree summary condition must be precise, as stated in the design. The splay tree isn't suited to this kind of search. Copied from Perforce Change: 184073 ServerID: perforce.ravenbrook.com
95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
/* range.h: ADDRESS RANGE INTERFACE
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*
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* $Id$
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* Copyright (c) 2013 Ravenbrook Limited. See end of file for license.
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*
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* .purpose: Representation of address ranges.
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*
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* .design: <design/range/>
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*/
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#ifndef range_h
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#define range_h
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#include "mpmtypes.h"
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/* Signatures */
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#define RangeSig ((Sig)0x5196A493) /* SIGnature RANGE */
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/* Prototypes */
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typedef struct RangeStruct *Range;
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#define RangeBase(range) ((range)->base)
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#define RangeLimit(range) ((range)->limit)
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#define RangeSize(range) (AddrOffset(RangeBase(range), RangeLimit(range)))
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extern void RangeInit(Range range, Addr base, Addr limit);
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extern void RangeFinish(Range range);
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extern Res RangeDescribe(Range range, mps_lib_FILE *stream);
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extern Bool RangeCheck(Range range);
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extern Bool RangeIsAligned(Range range, Align align);
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extern Bool RangesOverlap(Range range1, Range range2);
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extern Bool RangesNest(Range outer, Range inner);
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extern Bool RangesEqual(Range range1, Range range2);
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extern Addr (RangeBase)(Range range);
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extern Addr (RangeLimit)(Range range);
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extern Size (RangeSize)(Range range);
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#define RangeCopy(to, from) mps_lib_memcpy(to, from, sizeof(RangeStruct))
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/* Types */
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typedef struct RangeStruct {
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Sig sig;
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Addr base;
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Addr limit;
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} RangeStruct;
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#endif /* range_h */
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2013 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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