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/* poolams.h: AUTOMATIC MARK & SWEEP POOL CLASS INTERFACE
*
* $Id$
* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
* Portions copyright (C) 2002 Global Graphics Software.
*
* .purpose: Internal interface to AMS functionality. */
#ifndef poolams_h
#define poolams_h
#include "mpmtypes.h"
#include "mpmst.h"
#include "ring.h"
#include "bt.h"
#include <stdarg.h>
typedef struct AMSStruct *AMS;
typedef struct AMSSegStruct *AMSSeg;
/* AMSRingFunction is the type of the method to find the ring that */
/* the AMS pool is allocating on. */
typedef Ring (*AMSRingFunction)(AMS ams, RankSet rankSet, Size size);
/* AMSSegClassFunction is the type of the method to indicate */
/* the segment class of an AMS pool. Returns a subclass of AMSSegClass. */
/* The type is congruent with SegClassGet functions. */
typedef SegClass (*AMSSegClassFunction)(void);
/* AMSSegsDestroyFunction is the type of the method to destroy all */
/* segs of an AMS pool. */
typedef void (*AMSSegsDestroyFunction)(AMS ams);
/* AMSSegSizePolicyFunction is the type of the method which picks */
/* a segment size given an object size. */
typedef Res (*AMSSegSizePolicyFunction)(Size *sizeReturn,
Pool pool, Size size,
RankSet rankSet);
typedef struct AMSStruct {
PoolStruct poolStruct; /* generic pool structure */
Shift grainShift; /* log2 of grain size */
Chain chain; /* chain used by this pool */
PoolGenStruct pgen; /* generation representing the pool */
Size size; /* total segment size of the pool */
AMSSegSizePolicyFunction segSize; /* SegSize policy */
RingStruct segRing; /* ring of segments in the pool */
AMSRingFunction allocRing; /* fn to get the ring to allocate from */
AMSSegsDestroyFunction segsDestroy;
AMSSegClassFunction segClass;/* fn to get the class for segments */
Bool shareAllocTable; /* the alloc table is also used as white table */
Sig sig; /* <design/pool/#outer-structure.sig> */
} AMSStruct;
typedef struct AMSSegStruct {
GCSegStruct gcSegStruct; /* superclass fields must come first */
AMS ams; /* owning ams */
RingStruct segRing; /* ring that this seg belongs to */
Count grains; /* number of grains */
Count free; /* number of free grains */
Count newAlloc; /* number of grains allocated since last GC */
Bool allocTableInUse; /* allocTable is used */
Index firstFree; /* 1st free grain, if allocTable is not used */
BT allocTable; /* set if grain is allocated */
/* <design/poolams/#colour.single> */
Bool marksChanged; /* seg has been marked since last scan */
Bool ambiguousFixes; /* seg has been ambiguously marked since last scan */
Bool colourTablesInUse;/* the colour tables are in use */
BT nonwhiteTable; /* set if grain not white */
BT nongreyTable; /* set if not first grain of grey object */
Sig sig;
} AMSSegStruct;
/* macros to get between child and parent structures */
#define Seg2AMSSeg(seg) ((AMSSeg)(seg))
#define AMSSeg2Seg(amsseg) ((Seg)(amsseg))
#define Pool2AMS(pool) PARENT(AMSStruct, poolStruct, pool)
#define AMS2Pool(ams) (&(ams)->poolStruct)
/* macros for abstracting index/address computations */
/* <design/poolams/#addr-index.slow> */
/* only use when size is a multiple of the grain size */
#define AMSGrains(ams, size) ((size) >> (ams)->grainShift)
#define AMSGrainsSize(ams, grains) ((grains) << (ams)->grainShift)
#define AMSSegShift(seg) (Seg2AMSSeg(seg)->ams->grainShift)
#define AMS_ADDR_INDEX(seg, addr) \
((Index)(AddrOffset(SegBase(seg), addr) >> AMSSegShift(seg)))
#define AMS_INDEX_ADDR(seg, index) \
AddrAdd(SegBase(seg), (Size)(index) << AMSSegShift(seg))
/* colour ops */
#define AMS_IS_WHITE(seg, index) \
(!BTGet(Seg2AMSSeg(seg)->nonwhiteTable, index))
#define AMS_IS_GREY(seg, index) \
(!BTGet(Seg2AMSSeg(seg)->nongreyTable, index))
#define AMS_IS_BLACK(seg, index) \
(!AMS_IS_GREY(seg, index) && !AMS_IS_WHITE(seg, index))
#define AMS_IS_INVALID_COLOUR(seg, index) \
(AMS_IS_GREY(seg, index) && !AMS_IS_WHITE(seg, index))
#define AMS_WHITE_GREYEN(seg, index) \
BEGIN \
BTRes(Seg2AMSSeg(seg)->nongreyTable, index); \
END
#define AMS_GREY_BLACKEN(seg, index) \
BEGIN \
BTSet(Seg2AMSSeg(seg)->nongreyTable, index); \
BTSet(Seg2AMSSeg(seg)->nonwhiteTable, index); \
END
#define AMS_WHITE_BLACKEN(seg, index) \
BEGIN \
BTSet(Seg2AMSSeg(seg)->nonwhiteTable, index); \
END
#define AMS_RANGE_WHITE_BLACKEN(seg, base, limit) \
BEGIN \
BTSetRange(Seg2AMSSeg(seg)->nonwhiteTable, base, limit); \
END
#define AMS_RANGE_BLACKEN(seg, base, limit) \
BEGIN \
BTSetRange(Seg2AMSSeg(seg)->nonwhiteTable, base, limit); \
BTSetRange(Seg2AMSSeg(seg)->nongreyTable, base, limit); \
END
#define AMS_RANGE_WHITEN(seg, base, limit) \
BEGIN \
BTResRange(Seg2AMSSeg(seg)->nonwhiteTable, base, limit); \
BTSetRange(Seg2AMSSeg(seg)->nongreyTable, base, limit); \
END
#define AMSFindGrey(pos, dummy, seg, base, limit) \
BTFindShortResRange(pos, dummy, Seg2AMSSeg(seg)->nongreyTable, \
base, limit, 1)
#define AMSFindWhite(pos, dummy, seg, base, limit) \
BTFindShortResRange(pos, dummy, Seg2AMSSeg(seg)->nonwhiteTable, \
base, limit, 1)
#define AMS_FIND_WHITE_RANGE(baseOut, limitOut, seg, base, limit) \
BTFindLongResRange(baseOut, limitOut, Seg2AMSSeg(seg)->nonwhiteTable, \
base, limit, 1)
#define AMS_ALLOCED(seg, index) \
(Seg2AMSSeg(seg)->allocTableInUse \
? BTGet(Seg2AMSSeg(seg)->allocTable, index) \
: (Seg2AMSSeg(seg)->firstFree > (index)))
/* the rest */
extern Res AMSInitInternal(AMS ams, Format format, Chain chain,
Bool shareAllocTable);
extern void AMSFinish(Pool pool);
extern Bool AMSCheck(AMS ams);
extern Res AMSScan(Bool *totalReturn, ScanState ss, Pool pool, Seg seg);
#define AMSChain(ams) ((ams)->chain)
extern void AMSSegFreeWalk(AMSSeg amsseg, FreeBlockStepMethod f, void *p);
extern void AMSSegFreeCheck(AMSSeg amsseg);
typedef SegClass AMSSegClass;
typedef SegClassStruct AMSSegClassStruct;
extern AMSSegClass AMSSegClassGet(void);
extern Bool AMSSegCheck(AMSSeg seg);
typedef PoolClass AMSPoolClass;
typedef PoolClassStruct AMSPoolClassStruct;
extern AMSPoolClass AMSPoolClassGet(void);
extern AMSPoolClass AMSDebugPoolClassGet(void);
#endif /* poolams_h */
/* C. COPYRIGHT AND LICENSE
*
* Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
* All rights reserved. This is an open source license. Contact
* Ravenbrook for commercial licensing options.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Redistributions in any form must be accompanied by information on how
* to obtain complete source code for this software and any accompanying
* software that uses this software. The source code must either be
* included in the distribution or be available for no more than the cost
* of distribution plus a nominal fee, and must be freely redistributable
* under reasonable conditions. For an executable file, complete source
* code means the source code for all modules it contains. It does not
* include source code for modules or files that typically accompany the
* major components of the operating system on which the executable file
* runs.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
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