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/* locus.h: GENERATION CHAINS
*
* $Id$
* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
*/
#ifndef locus_h
#define locus_h
#include "mpmtypes.h"
#include "ring.h"
/* GenParamStruct -- structure for specifying generation parameters */
/* .gen-param: This structure must match <code/mps.h#gen-param>. */
typedef struct GenParamStruct *GenParam;
typedef struct GenParamStruct {
Size capacity; /* capacity in kB */
double mortality; /* predicted mortality */
} GenParamStruct;
/* GenTrace -- per-generation per-trace structure */
typedef struct GenTraceStruct *GenTrace;
typedef struct GenTraceStruct {
RingStruct traceRing; /* link in ring of generations condemned by trace */
Size condemned; /* size of objects condemned by the trace */
Size forwarded; /* size of objects that were forwarded by the trace */
Size preservedInPlace; /* size of objects preserved in place by the trace */
} GenTraceStruct;
/* GenDesc -- descriptor of a generation in a chain */
typedef struct GenDescStruct *GenDesc;
#define GenDescSig ((Sig)0x5199E4DE) /* SIGnature GEN DEsc */
typedef struct GenDescStruct {
Sig sig; /* design.mps.sig.field */
Serial serial; /* serial number within arena */
ZoneSet zones; /* zoneset for this generation */
Size capacity; /* capacity in bytes */
double mortality; /* moving average mortality */
RingStruct locusRing; /* Ring of all PoolGen's in this GenDesc (locus) */
RingStruct segRing; /* Ring of GCSegs in this generation */
TraceSet activeTraces; /* set of traces collecting this generation */
GenTraceStruct trace[TraceLIMIT];
} GenDescStruct;
/* PoolGen -- descriptor of a generation in a pool */
#define PoolGenSig ((Sig)0x519B009E) /* SIGnature POOl GEn */
typedef struct PoolGenStruct {
Sig sig; /* design.mps.sig.field */
Pool pool; /* pool this belongs to */
GenDesc gen; /* generation this belongs to */
/* link in ring of all PoolGen's in this GenDesc (locus) */
RingStruct genRing;
/* Accounting of memory in this generation for this pool */
Size segs; /* number of segments */
Size totalSize; /* total (sum of segment sizes) */
Size freeSize; /* unused (free or lost to fragmentation) */
Size bufferedSize; /* held in buffers but not condemned yet */
Size newSize; /* allocated since last collection */
Size oldSize; /* allocated prior to last collection */
Size newDeferredSize; /* new (but deferred) */
Size oldDeferredSize; /* old (but deferred) */
} PoolGenStruct;
/* Chain -- a generation chain */
#define ChainSig ((Sig)0x519C8A14) /* SIGnature CHAIN */
typedef struct mps_chain_s {
Sig sig; /* design.mps.sig.field */
Arena arena;
RingStruct chainRing; /* list of chains in the arena */
size_t genCount; /* number of generations */
GenDesc gens; /* the array of generations */
} ChainStruct;
extern Bool GenDescCheck(GenDesc gen);
extern Size GenDescNewSize(GenDesc gen);
extern Size GenDescTotalSize(GenDesc gen);
extern void GenDescStartTrace(GenDesc gen, Trace trace);
extern void GenDescEndTrace(GenDesc gen, Trace trace);
extern void GenDescCondemned(GenDesc gen, Trace trace, Size size);
extern void GenDescSurvived(GenDesc gen, Trace trace, Size forwarded, Size preservedInPlace);
extern Res GenDescDescribe(GenDesc gen, mps_lib_FILE *stream, Count depth);
#define GenDescOfTraceRing(node, tr) PARENT(GenDescStruct, trace, RING_ELT(GenTrace, traceRing, node) - (tr)->ti)
extern Res ChainCreate(Chain *chainReturn, Arena arena, size_t genCount,
GenParam params);
extern void ChainDestroy(Chain chain);
extern Bool ChainCheck(Chain chain);
extern double ChainDeferral(Chain chain);
extern size_t ChainGens(Chain chain);
extern GenDesc ChainGen(Chain chain, Index gen);
extern Res ChainDescribe(Chain chain, mps_lib_FILE *stream, Count depth);
extern Bool PoolGenCheck(PoolGen pgen);
extern Res PoolGenInit(PoolGen pgen, GenDesc gen, Pool pool);
extern void PoolGenFinish(PoolGen pgen);
extern Res PoolGenAlloc(Seg *segReturn, PoolGen pgen, SegClass klass,
Size size, ArgList args);
extern void PoolGenFree(PoolGen pgen, Seg seg, Size freeSize, Size oldSize,
Size newSize, Bool deferred);
extern void PoolGenAccountForFill(PoolGen pgen, Size size);
extern void PoolGenAccountForEmpty(PoolGen pgen, Size used, Size unused, Bool deferred);
extern void PoolGenAccountForAge(PoolGen pgen, Size wasBuffered, Size wasNew, Bool deferred);
extern void PoolGenAccountForReclaim(PoolGen pgen, Size reclaimed, Bool deferred);
extern void PoolGenUndefer(PoolGen pgen, Size oldSize, Size newSize);
extern void PoolGenAccountForSegSplit(PoolGen pgen);
extern void PoolGenAccountForSegMerge(PoolGen pgen);
extern Res PoolGenDescribe(PoolGen gen, mps_lib_FILE *stream, Count depth);
#endif /* locus_h */
/* C. COPYRIGHT AND LICENSE
*
* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
*
* 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.
*
* 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 AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR 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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