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emacs/mps/src/mpm.h
Tony Mann 09c8a90815 Change.mps.dylan.kinglet.160296: 
Next-method calls should not have to explicitly name the superclass

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/* impl.h.mpm: MEMORY POOL MANAGER DEFINITIONS
*
* $HopeName: MMsrc!mpm.h(trunk.129) $
* Copyright (C) 1999. Harlequin Limited. All rights reserved.
*/
#ifndef mpm_h
#define mpm_h
#include "config.h"
#include "misc.h" /* miscellaneous non-specific bits and bobs */
#include "check.h" /* assertion and consistency checking support */
#include "mpmtypes.h"
#include "mpmst.h"
#include "event.h"
#include "lock.h"
#include "th.h"
#include "poolmv.h"
#include "poolmfs.h"
#include "ss.h"
#include "mpslib.h"
/* CheckLevel -- Control check method behaviour; see impl.c.assert */
extern Word CheckLevel;
/* MPMCheck -- check MPM assumptions */
extern Bool MPMCheck(void);
/* Miscellaneous Checks -- see impl.c.mpm */
/* design.mps.type.bool.check */
extern Bool (BoolCheck)(Bool b);
/* design.mps.type.bool.check.inline */
#define BoolCheck(b) ((unsigned)(b) <= 1)
extern Bool FunCheck(Fun f);
extern Bool ShiftCheck(Shift shift);
extern Bool AttrCheck(Attr attr);
extern Bool RootVarCheck(RootVar rootVar);
#define FUNCHECK(f) (FunCheck((Fun)f))
/* Address/Size Interface -- see impl.c.mpm */
extern Bool AlignCheck(Align align);
extern Bool (WordIsAligned)(Word word, Align align);
#define WordIsAligned(w, a) (((w) & ((a) - 1)) == 0)
extern Word (WordAlignUp)(Word word, Align align);
#define WordAlignUp(w, a) (((w) + (a) - 1) & ~((Word)(a) - 1))
/* Rounds w up to a multiple of r, see impl.c.mpm for exact behaviour */
extern Word (WordRoundUp)(Word word, Size round);
#define WordRoundUp(w, r) (((w)+(r)-1) - ((w)+(r)-1)%(r))
extern Word (WordAlignDown)(Word word, Align align);
#define WordAlignDown(w, a) ((w) & ~((Word)(a) - 1))
#define size_tAlignUp(s, a) ((size_t)WordAlignUp((Word)(s), a))
extern void *(PointerAdd)(void *p, size_t s);
#define PointerAdd(p, s) ((void *)((char *)(p) + (s)))
extern void *(PointerSub)(void *p, size_t s);
#define PointerSub(p, s) ((void *)((char *)(p) - (s)))
extern size_t (PointerOffset)(void *base, void *limit);
#define PointerOffset(base, limit) \
((size_t)((char *)(limit) - (char *)(base)))
extern void *(PointerAlignUp)(void *p, size_t s);
#define PointerAlignUp(p, s) \
((void *)WordAlignUp((Word)(p), (Align)(s)))
extern Addr (AddrAdd)(Addr addr, Size size);
#define AddrAdd(p, s) ((Addr)PointerAdd((void *)(p), (s)))
extern Addr (AddrSub)(Addr addr, Size size);
#define AddrSub(p, s) ((Addr)PointerSub((void *)(p), (s)))
extern Size (AddrOffset)(Addr base, Addr limit);
#define AddrOffset(b, l) \
((Size)(PointerOffset((void *)(b), (void *)(l))))
extern Addr (AddrAlignDown)(Addr addr, Align align);
#define AddrAlignDown(p, a) ((Addr)WordAlignDown(AddrWord((p)), (a)))
#define AddrWord(a) ((Word)(a))
#define SizeWord(s) ((Word)(s))
#define IndexWord(s) ((Word)(s))
#define AlignWord(s) ((Word)(s))
#define AddrIsAligned(p, a) WordIsAligned(AddrWord(p), (a))
#define AddrAlignUp(p, a) ((Addr)WordAlignUp(AddrWord(p), (a)))
#define SizeIsAligned(s, a) WordIsAligned(SizeWord(s), (a))
#define SizeAlignUp(s, a) ((Size)WordAlignUp(SizeWord(s), (a)))
#define SizeAlignDown(s, a) ((Size)WordAlignDown(SizeWord(s), (a)))
#define IndexIsAligned(s, a) WordIsAligned(IndexWord(s), (a))
#define IndexAlignUp(s, a) ((Index)WordAlignUp(IndexWord(s), (a)))
#define IndexAlignDown(s, a) ((Index)WordAlignDown(IndexWord(s), (a)))
/* r not required to be a power of 2 */
#define SizeRoundUp(s, r) \
((Size)WordRoundUp(SizeWord(s), (Size)(r)))
extern Addr (AddrSet)(Addr target, Byte value, Size size);
/* This is one of the places that implements Addr, so it's allowed to */
/* convert to void *, see design.mps.type.addr.ops.mem. */
#define AddrSet(target, value, size) \
mps_lib_memset(target, (int)(value), size)
extern Addr (AddrCopy)(Addr target, Addr source, Size size);
#define AddrCopy(target, source, size) \
mps_lib_memcpy(target, source, size)
extern int (AddrComp)(Addr a, Addr b, Size size);
#define AddrComp(a, b, size) \
mps_lib_memcmp(a, b, size)
#define AlignIsAligned(a1, a2) WordIsAligned(AlignWord(a1), (a2))
/* Result codes */
extern Bool ResIsAllocFailure(Res res);
/* Logs and Powers
*
* SizeIsP2 returns TRUE if and only if size is a non-negative integer
* power of 2, and FALSE otherwise.
*
* SizeLog2 returns the logarithm in base 2 of size. size must be a
* power of 2.
*
* SizeFloorLog2 returns the floor of the logarithm in base 2 of size.
* size can be any positive non-zero value.
*/
extern Bool SizeIsP2(Size size);
extern Shift SizeLog2(Size size);
extern Shift SizeFloorLog2(Size size);
/* Formatted Output -- see design.mps.writef, impl.c.mpm */
extern Res WriteF(mps_lib_FILE *stream, ...);
/* Miscellaneous support -- see impl.c.mpm */
extern size_t StringLength(const char *s);
/* Ring Interface -- see design.mps.ring, impl.c.ring */
extern Bool RingCheck(Ring ring);
extern Bool RingCheckSingle(Ring ring);
extern Bool RingIsSingle(Ring ring);
/* .ring.init: */
extern void (RingInit)(Ring ring);
#define RingInit(ring) \
BEGIN \
Ring _ring = (ring); \
AVER(NULL != _ring); \
_ring->next = _ring; \
_ring->prev = _ring; \
AVER(RingCheck(_ring)); \
END
/* .ring.finish: */
extern void (RingFinish)(Ring ring);
#define RingFinish(ring) \
BEGIN \
Ring _ring = (ring); \
AVER(RingCheckSingle(_ring)); \
_ring->next = RingNONE; \
_ring->prev = RingNONE; \
END
/* .ring.append: */
extern void (RingAppend)(Ring ring, Ring new);
#define RingAppend(ring, new) \
BEGIN \
Ring _ring = (ring), _new = (new); \
AVER(RingCheck(_ring)); \
AVER(RingCheckSingle(_new)); \
_new->prev = _ring->prev; \
_new->next = _ring; \
_ring->prev->next = _new; \
_ring->prev = _new; \
END
/* .ring.insert: */
extern void (RingInsert)(Ring ring, Ring new);
#define RingInsert(ring, new) \
BEGIN \
Ring _ring = (ring), _new = (new); \
AVER(RingCheck(_ring)); \
AVER(RingCheckSingle(_new)); \
_new->prev = _ring; \
_new->next = _ring->next; \
_ring->next->prev = _new; \
_ring->next = _new; \
END
/* .ring.remove: */
extern void (RingRemove)(Ring old);
#define RingRemove(old) \
BEGIN \
Ring _old = (old); \
AVER(RingCheck(_old)); \
AVER(!RingIsSingle(_old)); \
_old->next->prev = _old->prev; \
_old->prev->next = _old->next; \
_old->next = _old; \
_old->prev = _old; \
END
/* .ring.next: */
extern Ring (RingNext)(Ring ring);
#define RingNext(ring) ((ring)->next)
/* .ring.elt: See design.mps.ring.elt */
#define RING_ELT(type, field, node) \
((type)((char *)(node) - (size_t)(&((type)0)->field)))
/* .ring.for: See design.mps.ring.for */
#define RING_FOR(node, ring, next) \
for(node = RingNext(ring), next = RingNext(node); \
node != (ring) ; \
node = (next), next = RingNext(node))
/* Version Determination
*
* See design.mps.version-library.
*/
/* Defined in impl.c.version */
extern char *MPSVersion(void);
/* Bit Table Interface -- see design.mps.bt.if.* for doc */
/* design.mps.bt.if.size */
extern size_t (BTSize)(unsigned long length);
#define BTSize(n) (((n)+MPS_WORD_WIDTH-1)/MPS_WORD_WIDTH*sizeof(Word))
/* design.mps.bt.if.get */
extern Bool (BTGet)(BT bt, Index index);
#define BTGet(a, i) ((Bool)(((a)[((i)>>MPS_WORD_SHIFT)] \
>> ((i)&~((Word)-1<<MPS_WORD_SHIFT))) \
& (Word)1))
/* design.mps.bt.if.set */
extern void (BTSet)(BT bt, Index index);
#define BTSet(a, i) \
BEGIN \
(a)[((i)>>MPS_WORD_SHIFT)] |= \
(Word)1<<((i)&~((Word)-1<<MPS_WORD_SHIFT)); \
END
/* design.mps.bt.if.res */
extern void (BTRes)(BT bt, Index index);
#define BTRes(a, i) \
BEGIN \
(a)[((i)>>MPS_WORD_SHIFT)] &= \
~((Word)1<<((i)&~((Word)-1<<MPS_WORD_SHIFT))); \
END
extern Res BTCreate(BT *btReturn, Arena arena, Count length);
extern void BTDestroy(BT bt, Arena arena, Count length);
extern void BTSetRange(BT bt, Index base, Index limit);
extern Bool BTIsSetRange(BT bt, Index base, Index limit);
extern void BTResRange(BT bt, Index base, Index limit);
extern Bool BTIsResRange(BT bt, Index base, Index limit);
extern Bool BTFindShortResRange(Index *baseReturn, Index *limitReturn,
BT bt,
Index searchBase, Index searchLimit,
unsigned long length);
extern Bool BTFindShortResRangeHigh(Index *baseReturn, Index *limitReturn,
BT bt,
Index searchBase, Index searchLimit,
unsigned long length);
extern Bool BTFindLongResRange(Index *baseReturn, Index *limitReturn,
BT bt,
Index searchBase, Index searchLimit,
unsigned long length);
extern Bool BTFindLongResRangeHigh(Index *baseReturn, Index *limitReturn,
BT bt,
Index searchBase, Index searchLimit,
unsigned long length);
extern Bool BTRangesSame(BT BTx, BT BTy, Index base, Index limit);
extern void BTCopyInvertRange(BT fromBT, BT toBT,
Index base, Index limit);
extern void BTCopyRange(BT fromBT, BT toBT,
Index base, Index limit);
extern void BTCopyOffsetRange(BT fromBT, BT toBT,
Index fromBase, Index fromLimit,
Index toBase, Index toLimit);
/* Pool Interface -- see impl.c.pool */
extern Res PoolInit(Pool pool, Arena arena,
PoolClass class, ...);
extern Res PoolInitV(Pool pool, Arena arena,
PoolClass class, va_list args);
extern void PoolFinish(Pool pool);
extern Bool PoolClassCheck(PoolClass class);
extern Bool PoolCheck(Pool pool);
extern Res PoolDescribe(Pool pool, mps_lib_FILE *stream);
extern Arena (PoolArena)(Pool pool);
#define PoolArena(pool) ((pool)->arena)
extern Bool PoolFormat(Format *formatReturn, Pool pool);
extern Align (PoolAlignment)(Pool pool);
#define PoolAlignment(pool) ((pool)->alignment)
extern double PoolMutatorAllocSize(Pool pool);
extern Ring (PoolSegRing)(Pool pool);
#define PoolSegRing(pool) (&(pool)->segRing)
extern Bool PoolOfAddr(Pool *poolReturn, Arena arena, Addr addr);
extern Bool PoolHasAddr(Pool pool, Addr addr);
extern Res PoolCreate(Pool *poolReturn, Arena arena,
PoolClass class, ...);
extern Res PoolCreateV(Pool *poolReturn, Arena arena,
PoolClass class, va_list arg);
extern void PoolDestroy(Pool pool);
extern BufferClass PoolDefaultBufferClass(Pool pool);
extern Res PoolAlloc(Addr *pReturn, Pool pool, Size size,
Bool withReservoirPermit);
extern void PoolFree(Pool pool, Addr old, Size size);
extern Res PoolTraceBegin(Pool pool, Trace trace);
extern Res PoolAccess(Pool pool, Seg seg, Addr addr,
AccessSet mode, MutatorFaultContext context);
extern Res PoolWhiten(Pool pool, Trace trace, Seg seg);
extern void PoolGrey(Pool pool, Trace trace, Seg seg);
extern void PoolBlacken(Pool pool, TraceSet traceSet, Seg seg);
extern Res PoolScan(Bool *totalReturn, ScanState ss, Pool pool, Seg seg);
extern Res (PoolFix)(Pool pool, ScanState ss, Seg seg, Addr *refIO);
#define PoolFix(pool, ss, seg, refIO) \
((*(pool)->class->fix)(pool, ss, seg, refIO))
extern void PoolFixEmergency(Pool pool, ScanState ss, Seg seg, Addr *refIO);
extern void PoolReclaim(Pool pool, Trace trace, Seg seg);
extern double PoolBenefit(Pool pool, Action action);
extern Res PoolAct(Pool pool, Action action);
extern void PoolWalk(Pool pool, Seg seg, FormattedObjectsStepMethod f,
void *v, unsigned long s);
extern Res PoolTrivInit(Pool pool, va_list arg);
extern void PoolTrivFinish(Pool pool);
extern Res PoolNoAlloc(Addr *pReturn, Pool pool, Size size,
Bool withReservoirPermit);
extern Res PoolTrivAlloc(Addr *pReturn, Pool pool, Size size,
Bool withReservoirPermit);
extern void PoolNoFree(Pool pool, Addr old, Size size);
extern void PoolTrivFree(Pool pool, Addr old, Size size);
extern Res PoolNoBufferFill(Addr *baseReturn, Addr *limitReturn,
Pool pool, Buffer buffer, Size size,
Bool withReservoirPermit);
extern Res PoolTrivBufferFill(Addr *baseReturn, Addr *limitReturn,
Pool pool, Buffer buffer, Size size,
Bool withReservoirPermit);
extern void PoolNoBufferEmpty(Pool pool, Buffer buffer,
Addr init, Addr limit);
extern void PoolTrivBufferEmpty(Pool pool, Buffer buffer,
Addr init, Addr limit);
extern Res PoolNoDescribe(Pool pool, mps_lib_FILE *stream);
extern Res PoolTrivDescribe(Pool pool, mps_lib_FILE *stream);
extern Res PoolNoTraceBegin(Pool pool, Trace trace);
extern Res PoolTrivTraceBegin(Pool pool, Trace trace);
extern Res PoolNoAccess(Pool pool, Seg seg, Addr addr,
AccessSet mode, MutatorFaultContext context);
extern Res PoolSegAccess(Pool pool, Seg seg, Addr addr,
AccessSet mode, MutatorFaultContext context);
extern Res PoolSingleAccess(Pool pool, Seg seg, Addr addr,
AccessSet mode, MutatorFaultContext context);
extern Res PoolNoWhiten(Pool pool, Trace trace, Seg seg);
extern Res PoolTrivWhiten(Pool pool, Trace trace, Seg seg);
extern void PoolNoGrey(Pool pool, Trace trace, Seg seg);
extern void PoolTrivGrey(Pool pool, Trace trace, Seg seg);
extern void PoolNoBlacken(Pool pool, TraceSet traceSet, Seg seg);
extern void PoolTrivBlacken(Pool pool, TraceSet traceSet, Seg seg);
extern Res PoolNoScan(Bool *totalReturn, ScanState ss, Pool pool, Seg seg);
extern Res PoolNoFix(Pool pool, ScanState ss, Seg seg, Ref *refIO);
extern void PoolNoReclaim(Pool pool, Trace trace, Seg seg);
extern double PoolNoBenefit(Pool pool, Action action);
extern Res PoolNoAct(Pool pool, Action action);
extern void PoolNoRampBegin(Pool pool, Buffer buf, Bool collectAll);
extern void PoolTrivRampBegin(Pool pool, Buffer buf, Bool collectAll);
extern void PoolNoRampEnd(Pool pool, Buffer buf);
extern void PoolTrivRampEnd(Pool pool, Buffer buf);
extern Res PoolNoFramePush(AllocFrame *frameReturn,
Pool pool, Buffer buf);
extern Res PoolTrivFramePush(AllocFrame *frameReturn,
Pool pool, Buffer buf);
extern Res PoolNoFramePop(Pool pool, Buffer buf, AllocFrame frame);
extern Res PoolTrivFramePop(Pool pool, Buffer buf, AllocFrame frame);
extern void PoolNoFramePopPending(Pool pool, Buffer buf,
AllocFrame frame);
extern void PoolNoWalk(Pool pool, Seg seg,
FormattedObjectsStepMethod,
void *, unsigned long);
extern Res PoolCollectAct(Pool pool, Action action);
extern PoolDebugMixin PoolNoDebugMixin(Pool pool);
extern BufferClass PoolNoBufferClass(void);
#define ClassOfPool(pool) ((pool)->class)
#define SuperclassOfPool(pool) \
((PoolClass)ProtocolClassSuperclassPoly((pool)->class))
/* Abstract Pool Classes Interface -- see impl.c.poolabs */
extern void PoolClassMixInAllocFree(PoolClass class);
extern void PoolClassMixInBuffer(PoolClass class);
extern void PoolClassMixInScan(PoolClass class);
extern void PoolClassMixInFormat(PoolClass class);
extern void PoolClassMixInCollect(PoolClass class);
extern AbstractPoolClass EnsureAbstractPoolClass(void);
extern AbstractAllocFreePoolClass EnsureAbstractAllocFreePoolClass(void);
extern AbstractBufferPoolClass EnsureAbstractBufferPoolClass(void);
extern AbstractBufferPoolClass EnsureAbstractSegBufPoolClass(void);
extern AbstractScanPoolClass EnsureAbstractScanPoolClass(void);
extern AbstractCollectPoolClass EnsureAbstractCollectPoolClass(void);
/* DEFINE_POOL_CLASS
* convenience macro -- see design.mps.protocol.int.define-special
*/
#define DEFINE_POOL_CLASS(className, var) \
DEFINE_ALIAS_CLASS(className, PoolClass, var)
#define POOL_SUPERCLASS(className) \
(PoolClass)SUPERCLASS(className)
/* Message Interface -- see design.mps.message */
extern Bool MessageCheck(Message message);
extern Bool MessageClassCheck(MessageClass class);
extern Bool MessageTypeCheck(MessageType type);
extern MessageClass MessageGetClass(Message message);
extern Arena MessageArena(Message message);
extern void MessageInit(Arena arena, Message message,
MessageClass class, MessageType type);
extern void MessageFinish(Message message);
extern void MessagePost(Arena arena, Message message);
extern Bool MessagePoll(Arena arena);
extern MessageType MessageGetType(Message message);
extern void MessageDiscard(Arena arena, Message message);
extern void MessageEmpty(Arena arena);
extern Bool MessageGet(Message *messageReturn, Arena arena,
MessageType type);
extern Bool MessageQueueType(MessageType *typeReturn, Arena arena);
extern void MessageTypeEnable(Arena arena, MessageType type);
extern void MessageTypeDisable(Arena arena, MessageType type);
/* Message methods for MessageTypeFinalization */
/* Method dispatchers */
extern void MessageFinalizationRef(Ref *refReturn,
Arena arena, Message message);
extern Size MessageGCLiveSize(Message message);
extern Size MessageGCCondemnedSize(Message message);
extern Size MessageGCNotCondemnedSize(Message message);
/* Convenience methods */
extern void MessageNoFinalizationRef(Ref *refReturn,
Arena arena, Message message);
extern Size MessageNoGCLiveSize(Message message);
extern Size MessageNoGCCondemnedSize(Message message);
extern Size MessageNoGCNotCondemnedSize(Message message);
/* Trace Interface -- see impl.c.trace */
#define TraceSetSingle(ti) BS_SINGLE(TraceSet, (ti))
#define TraceSetIsSingle(ts) BS_IS_SINGLE(ts)
#define TraceSetIsMember(ts, ti)BS_IS_MEMBER((ts), (ti))
#define TraceSetAdd(ts, ti) BS_ADD(TraceSet, (ts), (ti))
#define TraceSetDel(ts, ti) BS_DEL(TraceSet, (ts), (ti))
#define TraceSetUnion(ts1, ts2) BS_UNION((ts1), (ts2))
#define TraceSetInter(ts1, ts2) BS_INTER((ts1), (ts2))
#define TraceSetDiff(ts1, ts2) BS_DIFF((ts1), (ts2))
#define TraceSetSuper(ts1, ts2) BS_SUPER((ts1), (ts2))
#define TraceSetSub(ts1, ts2) BS_SUB((ts1), (ts2))
extern TraceSet (TraceSetAdd)(TraceSet ts, TraceId id);
extern TraceSet (TraceSetDel)(TraceSet ts, TraceId id);
extern TraceSet (TraceSetUnion)(TraceSet ts1, TraceSet ts2);
extern Bool (TraceSetIsMember)(TraceSet ts, TraceId id);
#define TRACE_SET_ITER(ti, trace, ts, arena) \
for(ti = 0, trace = ArenaTrace(arena, ti); ti < TRACE_MAX; \
++ti, trace = ArenaTrace(arena, ti)) BEGIN \
if(TraceSetIsMember(ts, ti)) {
#define TRACE_SET_ITER_END(ti, trace, ts, arena) } END
extern void ScanStateInit(ScanState ss, TraceSet ts, Arena arena,
Rank rank, RefSet white);
extern void ScanStateFinish(ScanState ss);
extern Bool ScanStateCheck(ScanState ss);
extern void ScanStateSetSummary(ScanState ss, RefSet summary);
extern RefSet ScanStateSummary(ScanState ss);
extern Bool TraceIdCheck(TraceId id);
extern Bool TraceSetCheck(TraceSet ts);
extern Bool TraceCheck(Trace trace);
extern Res TraceCreate(Trace *traceReturn, Space space);
extern Res TraceAddWhite(Trace trace, Seg seg);
extern Res TraceCondemnRefSet(Trace trace, RefSet condemnedSet);
extern void TraceStart(Trace trace, double mortality, double finishingTime);
extern void TraceDestroy(Trace trace);
extern Res TraceStep(Trace trace);
extern void TracePoll(Trace trace);
extern void TraceSegAccess(Arena arena, Seg seg, AccessSet mode);
extern Res TraceFix(ScanState ss, Ref *refIO);
extern Res TraceFixEmergency(ScanState ss, Ref *refIO);
extern Size TraceGreyEstimate(Arena arena, RefSet refSet);
/* Collection control parameters */
/* Defined here, because they are used by more than one module. */
/* There are two sets of frequencies, for inside and outside ramp */
/* mode (except for the ramp generation itself). */
/* They have the wrong names because they originally came from AMC, */
/* and binary compatibility is required for external clients. */
extern unsigned long AMCGen0Frequency;
extern unsigned long AMCGen1Frequency;
extern unsigned long AMCGen2Frequency;
extern unsigned long AMCGen2plusFrequencyMultiplier;
extern unsigned long AMCRampGenFrequency;
extern unsigned long AMCGen0RampmodeFrequency;
extern unsigned long AMCGen1RampmodeFrequency;
extern unsigned long AMCGen2RampmodeFrequency;
extern unsigned long AMCGen2plusRampmodeFrequencyMultiplier;
extern Serial AMCRampGenFollows;
extern Serial AMCGenFinal;
extern double TraceGen0IncrementalityMultiple;
extern double TraceMortalityEstimate;
/* Equivalent to impl.h.mps MPS_SCAN_BEGIN */
#define TRACE_SCAN_BEGIN(ss) \
BEGIN \
Shift SCANzoneShift = (ss)->zoneShift; \
RefSet SCANwhite = (ss)->white; \
RefSet SCANsummary = (ss)->unfixedSummary; \
Word SCANt; \
{
/* Equivalent to impl.h.mps MPS_FIX1 */
#define TRACE_FIX1(ss, ref) \
(SCANt = (Word)1<<((Word)(ref)>>SCANzoneShift&(MPS_WORD_WIDTH-1)), \
SCANsummary |= SCANt, \
SCANwhite & SCANt)
/* Equivalent to impl.h.mps MPS_FIX2 */
#define TRACE_FIX2(ss, refIO) \
((*(ss)->fix)(ss, refIO))
/* Equivalent to impl.h.mps MPS_FIX */
#define TRACE_FIX(ss, refIO) \
(TRACE_FIX1(ss, *(refIO)) ? \
TRACE_FIX2(ss, refIO) : ResOK)
/* Equivalent to impl.h.mps MPS_SCAN_END */
#define TRACE_SCAN_END(ss) \
} \
(ss)->unfixedSummary = SCANsummary; \
END
extern Res TraceScanArea(ScanState ss, Addr *base, Addr *limit);
extern Res TraceScanAreaTagged(ScanState ss,
Addr *base, Addr *limit);
extern Res TraceScanAreaMasked(ScanState ss,
Addr *base, Addr *limit, Word mask);
extern void TraceScanSingleRef(TraceSet ts, Rank rank, Arena arena,
Seg seg, Ref *refIO);
/* Action Interface -- see design.mps.action */
extern Bool ActionCheck(Action action);
extern void ActionInit(Action action, Pool pool);
extern void ActionFinish(Action action);
extern void ActionPoll(Arena arena);
/* Arena Interface -- see impl.c.arena */
/* DEFINE_ARENA_CLASS
* convenience macro -- see design.mps.protocol.int.define-special
*/
#define DEFINE_ARENA_CLASS(className, var) \
DEFINE_ALIAS_CLASS(className, ArenaClass, var)
#define ARENA_SUPERCLASS(className) \
(ArenaClass)SUPERCLASS(className)
extern AbstractArenaClass EnsureAbstractArenaClass(void);
extern Bool ArenaClassCheck(ArenaClass class);
extern Bool ArenaCheck(Arena arena);
/* backward compatibility */
#define SpaceCheck(space) ArenaCheck(space)
extern Res ArenaCreateV(Arena *arenaReturn, ArenaClass class, va_list args);
extern void ArenaDestroy(Arena arena);
extern void ArenaInit(Arena arena, Lock lock, ArenaClass class);
extern void ArenaFinish(Arena arena);
extern Res ArenaDescribe(Arena arena, mps_lib_FILE *stream);
extern Res ArenaDescribeTracts(Arena arena, mps_lib_FILE *stream);
extern Bool ArenaAccess(Addr addr, AccessSet mode,
MutatorFaultContext context);
extern void (ArenaEnter)(Arena arena);
extern void (ArenaLeave)(Arena arena);
#if defined(THREAD_SINGLE) && defined(PROTECTION_NONE)
#define ArenaEnter(arena) UNUSED(arena)
#define ArenaLeave(arena) UNUSED(arena)
#endif
extern void (ArenaPoll)(Arena arena);
#ifdef MPS_PROD_EPCORE
#define ArenaPoll(arena) UNUSED(arena)
#endif
/* .nogc.why: ScriptWorks doesn't use MM-provided incremental GC, so */
/* doesn't need to poll when allocating. */
extern void ArenaClamp(Arena arena);
extern void ArenaRelease(Arena arena);
extern void ArenaPark(Arena arena);
extern Res ArenaCollect(Arena arena);
extern Res ControlAlloc(void **baseReturn, Arena arena, size_t size,
Bool withReservoirPermit);
extern void ControlFree(Arena arena, void *base, size_t size);
/* Peek/Poke
*
* These are provided so that modules in the MPS can make occasional
* access to client data. They perform the appropriate shield and
* summary manipulations that are necessary.
*
* Note that Peek and Poke can be called with address that may or
* may not be in arena managed memory. */
/* Peek reads a value */
extern Ref ArenaPeek(Arena arena, Addr addr);
/* Same, but addr must be in seg */
extern Ref ArenaPeekSeg(Arena arena, Seg seg, Addr addr);
/* Poke stores a value */
extern void ArenaPoke(Arena arena, Addr addr, Ref ref);
/* Same, but addr must be in seg */
extern void ArenaPokeSeg(Arena arena, Seg seg, Addr addr, Ref ref);
/* Read/Write
*
* These simulate mutator reads and writes to locations.
* They are effectively a software barrier, and maintain the tricolor
* invariant (hence performing any scanning or color manipulation
* necessary).
*
* Only Read provided right now.
*/
Ref ArenaRead(Arena arena, Addr addr);
#define ArenaPoolRing(arena) (&(arena)->poolRing)
#define ArenaRootRing(arena) (&(arena)->rootRing)
#define ArenaTraceRing(arena) (&(arena)->traceRing)
#define ArenaThreadRing(arena) (&(arena)->threadRing)
#define ArenaEpoch(arena) ((arena)->epoch) /* .epoch.ts */
#define ArenaTrace(arena, ti) (&(arena)->trace[ti])
#define ArenaZoneShift(arena) ((arena)->zoneShift)
#define ArenaAlign(arena) ((arena)->alignment)
#define ArenaGreyRing(arena, rank) \
(&(arena)->greyRing[rank])
extern Size ArenaReserved(Arena arena);
extern Size ArenaCommitted(Arena arena);
extern Size ArenaSpareCommitted(Arena arena);
extern Size ArenaCommitLimit(Arena arena);
extern Res ArenaSetCommitLimit(Arena arena, Size limit);
extern Size ArenaSpareCommitLimit(Arena arena);
extern void ArenaSetSpareCommitLimit(Arena arena, Size limit);
extern void ArenaNoSpareCommitExceeded(Arena arena);
extern double ArenaMutatorAllocSize(Arena arena);
extern Res ArenaExtend(Arena, Addr base, Size size);
extern Res ArenaRetract(Arena, Addr base, Size size);
extern Res ArenaFinalize(Arena arena, Ref obj);
extern Bool ArenaIsReservedAddr(Arena arena, Addr addr);
extern Reservoir ArenaReservoir(Arena arena);
extern Bool ReservoirCheck(Reservoir reservoir);
extern Res ReservoirInit(Reservoir reservoir, Arena arena);
extern void ReservoirFinish (Reservoir reservoir);
extern Size ReservoirLimit(Reservoir reservoir);
extern void ReservoirSetLimit(Reservoir reservoir, Size size);
extern Size ReservoirAvailable(Reservoir reservoir);
extern Res ReservoirEnsureFull(Reservoir reservoir);
extern void ReservoirDeposit(Reservoir reservoir, Addr base, Size size);
extern Res ReservoirWithdraw(Addr *baseReturn, Tract *baseTractReturn,
Reservoir reservoir, Size size, Pool pool);
extern Res ArenaAlloc(Addr *baseReturn, SegPref pref,
Size size, Pool pool, Bool withReservoirPermit);
extern void ArenaFree(Addr base, Size size, Pool pool);
extern Addr (TractBase)(Tract tract);
#define TractBase(tract) ((tract)->base)
extern Addr TractLimit(Tract tract);
extern Tract TractOfBaseAddr(Arena arena, Addr addr);
extern Bool TractOfAddr(Tract *tractReturn, Arena arena, Addr addr);
/* TractOfAddr macro, see design.mps.trace.fix.tractofaddr */
#define TRACT_OF_ADDR(tractReturn, arena, addr) \
((*(arena)->class->tractOfAddr)(tractReturn, arena, addr))
extern Bool TractFirst(Tract *tractReturn, Arena arena);
extern Bool TractNext(Tract *tractReturn, Arena arena, Addr addr);
extern Tract TractNextContig(Arena arena, Tract tract);
extern Bool TractCheck(Tract tract);
extern void TractInit(Tract tract, Pool pool, Addr base);
extern void TractFinish(Tract tract);
#define TractPool(tract) ((tract)->pool)
#define TractP(tract) ((tract)->p)
#define TractSetP(tract, pp) ((void)((tract)->p = (pp)))
#define TractHasSeg(tract) ((Bool)(tract)->hasSeg)
#define TractSetHasSeg(tract, b) ((void)((tract)->hasSeg = (b)))
#define TractWhite(tract) ((tract)->white)
#define TractSetWhite(tract, w) ((void)((tract)->white = w))
/* TRACT_*SEG -- Test / set / unset seg->tract associations
*
* These macros all multiply evaluate the tract parameter
*/
#define TRACT_SEG(segReturn, tract) \
(TractHasSeg(tract) && ((*(segReturn) = (Seg)TractP(tract)), TRUE))
#define TRACT_SET_SEG(tract, seg) \
(TractSetHasSeg(tract, TRUE), TractSetP(tract, seg))
#define TRACT_UNSET_SEG(tract) \
(TractSetHasSeg(tract, FALSE), TractSetP(tract, NULL))
/* Macro version of TractNextContig for use in iteration macros */
#define TRACT_NEXT_CONTIG(arena, tract) \
(*(arena)->class->tractNextContig)(arena, tract)
/* .tract.tract.for: See design.mps.arena.tract.tract.for */
/* paremeters arena & limit are evaluated multiple times */
#define TRACT_TRACT_FOR(tract, addr, arena, firstTract, limit) \
for((tract = (firstTract)), (addr = TractBase(tract)); \
tract != NULL; \
(addr = AddrAdd((addr),(arena)->alignment)), \
((addr < (limit)) ? \
(tract = TRACT_NEXT_CONTIG((arena), tract)) : \
(tract = NULL) /* terminate loop */))
/* .tract.for: See design.mps.arena.tract.for */
/* paremeters arena & limit are evaluated multiple times */
#define TRACT_FOR(tract, addr, arena, base, limit) \
for((tract = TractOfBaseAddr((arena), (base))), (addr = (base)); \
tract != NULL; \
(addr = AddrAdd((addr),(arena)->alignment)), \
((addr < (limit)) ? \
(tract = TRACT_NEXT_CONTIG((arena), tract)) : \
(tract = NULL) /* terminate loop */))
extern Res ArenaNoExtend(Arena arena, Addr base, Size size);
extern Res ArenaNoRetract(Arena arena, Addr base, Size size);
extern Res ArenaTrivDescribe(Arena arena, mps_lib_FILE *stream);
extern Bool SegPrefCheck(SegPref pref);
extern SegPref SegPrefDefault(void);
extern Res SegPrefExpress(SegPref pref, SegPrefKind kind, void *p);
extern Res SegAlloc(Seg *segReturn, SegClass class, SegPref pref,
Size size, Pool pool, Bool withReservoirPermit,
...);
extern void SegFree(Seg seg);
extern Bool SegOfAddr(Seg *segReturn, Arena arena, Addr addr);
extern Bool SegFirst(Seg *segReturn, Arena arena);
extern Bool SegNext(Seg *segReturn, Arena arena, Addr addr);
extern void SegSetWhite(Seg seg, TraceSet white);
extern void SegSetGrey(Seg seg, TraceSet grey);
extern void SegSetRankSet(Seg seg, RankSet rankSet);
extern void SegSetRankAndSummary(Seg seg, RankSet rankSet, RefSet summary);
extern Res SegMerge(Seg *mergedSegReturn, Seg segLo, Seg segHi,
Bool withReservoirPermit, ...);
extern Res SegSplit(Seg *segLoReturn, Seg *segHiReturn, Seg seg, Addr at,
Bool withReservoirPermit, ...);
extern Res SegDescribe(Seg seg, mps_lib_FILE *stream);
extern RefSet SegSummary(Seg seg);
extern void SegSetSummary(Seg seg, RefSet summary);
extern Buffer SegBuffer(Seg seg);
extern void SegSetBuffer(Seg seg, Buffer buffer);
extern Bool SegCheck(Seg seg);
extern Bool GCSegCheck(GCSeg gcseg);
extern Bool SegClassCheck(SegClass class);
extern SegClass EnsureSegClass(void);
extern SegClass EnsureGCSegClass(void);
extern void SegClassMixInNoSplitMerge(SegClass class);
/* DEFINE_SEG_CLASS
* convenience macro -- see design.mps.protocol.int.define-special
*/
#define DEFINE_SEG_CLASS(className, var) \
DEFINE_ALIAS_CLASS(className, SegClass, var)
#define SEG_SUPERCLASS(className) \
(SegClass)SUPERCLASS(className)
extern Size SegSize(Seg seg);
extern Addr (SegBase)(Seg seg);
extern Addr (SegLimit)(Seg seg);
#define SegBase(seg) (TractBase((seg)->firstTract))
#define SegLimit(seg) ((seg)->limit)
#define SegPool(seg) (TractPool((seg)->firstTract))
/* .bitfield.promote: The bit field accesses need to be cast to the */
/* right type, otherwise they'll be promoted to signed int, see */
/* standard.ansic.6.2.1.1. */
#define SegRankSet(seg) ((RankSet)(seg)->rankSet)
#define SegPM(seg) ((AccessSet)(seg)->pm)
#define SegSM(seg) ((AccessSet)(seg)->sm)
#define SegDepth(seg) ((unsigned)(seg)->depth)
#define SegGrey(seg) ((TraceSet)(seg)->grey)
#define SegWhite(seg) ((TraceSet)(seg)->white)
#define SegNailed(seg) ((seg)->nailed)
#define SegOfPoolRing(node) (RING_ELT(Seg, poolRing, (node)))
#define SegOfGreyRing(node) (&(RING_ELT(GCSeg, greyRing, (node)) \
->segStruct))
#define SegSetPM(seg, mode) ((void)((seg)->pm = (mode)))
#define SegSetSM(seg, mode) ((void)((seg)->sm = (mode)))
#define SegSetDepth(seg, d) ((void)((seg)->depth = (d)))
#define SegSetNailed(seg, ts) ((void)((seg)->nailed = (ts)))
/* Buffer Interface -- see impl.c.buffer */
extern Res BufferCreate(Buffer *bufferReturn, BufferClass class,
Pool pool, Bool isMutator, ...);
extern Res BufferCreateV(Buffer *bufferReturn, BufferClass class,
Pool pool, Bool isMutator, va_list args);
extern void BufferDestroy(Buffer buffer);
extern Bool BufferCheck(Buffer buffer);
extern Bool SegBufCheck(SegBuf segbuf);
extern Res BufferDescribe(Buffer buffer, mps_lib_FILE *stream);
extern Res BufferReserve(Addr *pReturn, Buffer buffer, Size size,
Bool withReservoirPermit);
/* macro equivalent for BufferReserve, keep in sync with
* impl.c.buffer */
#define BUFFER_RESERVE(pReturn, buffer, size, withReservoirPermit) \
(AddrAdd(BufferAlloc(buffer), size) > BufferAlloc(buffer) && \
AddrAdd(BufferAlloc(buffer), size) <= BufferAP(buffer)->limit ? \
(*(pReturn) = BufferAlloc(buffer), \
BufferAP(buffer)->alloc = AddrAdd(BufferAlloc(buffer), size), \
ResOK) : \
BufferFill(pReturn, buffer, size, withReservoirPermit))
extern Res BufferFill(Addr *pReturn, Buffer buffer, Size size,
Bool withReservoirPermit);
extern Bool BufferCommit(Buffer buffer, Addr p, Size size);
/* macro equivalent for BufferCommit, keep in sync with
* impl.c.buffer */
#define BUFFER_COMMIT(buffer, p, size) \
(BufferAP(buffer)->init = BufferAlloc(buffer), \
BufferAP(buffer)->limit != 0 || BufferTrip(buffer, p, size))
extern Bool BufferTrip(Buffer buffer, Addr p, Size size);
extern void BufferFinish(Buffer buffer);
extern Bool BufferIsReset(Buffer buffer);
extern Bool BufferIsReady(Buffer buffer);
extern Bool BufferIsMutator(Buffer buffer);
extern void BufferSetAllocAddr(Buffer buffer, Addr addr);
extern void BufferAttach(Buffer buffer,
Addr base, Addr limit, Addr init, Size size);
extern void BufferDetach(Buffer buffer, Pool pool);
extern void BufferFlip(Buffer buffer);
extern Addr BufferScanLimit(Buffer buffer);
extern AP (BufferAP)(Buffer buffer);
#define BufferAP(buffer) (&(buffer)->apStruct)
extern Buffer BufferOfAP(AP ap);
#define BufferOfAP(ap) PARENT(BufferStruct, apStruct, (ap))
extern Arena BufferArena(Buffer buffer);
#define BufferArena(buffer) ((buffer)->arena)
extern Pool (BufferPool)(Buffer buffer);
#define BufferPool(buffer) ((buffer)->pool)
extern Seg BufferSeg(Buffer buffer);
extern RankSet BufferRankSet(Buffer buffer);
extern void BufferSetRankSet(Buffer buffer, RankSet rankset);
extern Addr (BufferBase)(Buffer buffer);
#define BufferBase(buffer) ((buffer)->base)
extern Addr (BufferGetInit)(Buffer buffer);
#define BufferGetInit(buffer) (BufferAP(buffer)->init)
extern Addr (BufferAlloc)(Buffer buffer);
#define BufferAlloc(buffer) (BufferAP(buffer)->alloc)
extern Addr (BufferLimit)(Buffer buffer);
#define BufferLimit(buffer) ((buffer)->poolLimit)
extern void BufferReassignSeg(Buffer buffer, Seg seg);
extern Bool BufferIsTrapped(Buffer buffer);
extern Bool BufferIsTrappedByMutator(Buffer buffer);
extern void BufferRampBegin(Buffer buffer, AllocPattern pattern);
extern Res BufferRampEnd(Buffer buffer);
extern void BufferRampReset(Buffer buffer);
extern Res BufferFramePush(AllocFrame *frameReturn, Buffer buffer);
extern Res BufferFramePop(Buffer buffer, AllocFrame frame);
extern FrameState BufferFrameState(Buffer buffer);
extern void BufferFrameSetState(Buffer buffer, FrameState state);
/* DEFINE_BUFFER_CLASS
* convenience macro -- see design.mps.protocol.int.define-special
*/
#define DEFINE_BUFFER_CLASS(className, var) \
DEFINE_ALIAS_CLASS(className, BufferClass, var)
#define BUFFER_SUPERCLASS(className) \
(BufferClass)SUPERCLASS(className)
extern Bool BufferClassCheck(BufferClass class);
extern BufferClass EnsureBufferClass(void);
extern BufferClass EnsureSegBufClass(void);
extern BufferClass EnsureRankBufClass(void);
extern AllocPattern AllocPatternRamp(void);
extern AllocPattern AllocPatternRampCollectAll(void);
/* Format Interface -- see impl.c.format */
extern Bool FormatCheck(Format format);
extern Res FormatCreate(Format *formatReturn, Arena arena,
Align alignment,
FormatVariety variety,
FormatScanMethod scan,
FormatSkipMethod skip,
FormatMoveMethod move,
FormatIsMovedMethod isMoved,
FormatCopyMethod copy,
FormatPadMethod pad,
FormatClassMethod class);
extern void FormatDestroy(Format format);
extern Arena FormatArena(Format format);
extern Res FormatDescribe(Format format, mps_lib_FILE *stream);
/* Reference Interface -- see impl.c.ref */
extern Bool RankCheck(Rank rank);
extern Bool RankSetCheck(RankSet rankSet);
#define RankSetIsMember(rs, r) BS_IS_MEMBER((rs), (r))
#define RankSetSingle(r) BS_SINGLE(RankSet, (r))
#define RankSetIsSingle(r) BS_IS_SINGLE(r)
#define RankSetUnion(rs1, rs2) BS_UNION((rs1), (rs2))
#define RankSetDel(rs, r) BS_DEL(RankSet, (rs), (r))
#define RefSetCheck(refset) TRUE
#define RefSetZone(arena, addr) \
(((Word)(addr) >> (arena)->zoneShift) & (MPS_WORD_WIDTH - 1))
#define RefSetUnion(rs1, rs2) BS_UNION((rs1), (rs2))
#define RefSetInter(rs1, rs2) BS_INTER((rs1), (rs2))
#define RefSetAdd(arena, rs, addr) \
BS_ADD(RefSet, (rs), RefSetZone((arena), (addr)))
#define RefSetIsMember(arena, rs, addr) \
BS_IS_MEMBER((rs), RefSetZone((arena), (addr)))
#define RefSetSuper(rs1, rs2) BS_SUPER((rs1), (rs2))
#define RefSetDiff(rs1, rs2) BS_DIFF((rs1), (rs2))
#define RefSetSub(rs1, rs2) BS_SUB((rs1), (rs2))
#define RefSetComp(rs) BS_COMP(rs)
extern RefSet RefSetOfRange(Arena arena, Addr base, Addr limit);
extern RefSet RefSetOfSeg(Arena arena, Seg seg);
/* Shield Interface -- see impl.c.shield */
#define AccessSetIsMember(as, a) BS_IS_MEMBER((as), (a))
#define AccessSetAdd(as, a) BS_ADD(AccessSet, (as), (a))
#define AccessSetDel(as, a) BS_DEL(AccessSet, (as), (a))
extern void (ShieldRaise)(Arena arena, Seg seg, AccessSet mode);
extern void (ShieldLower)(Arena arena, Seg seg, AccessSet mode);
extern void (ShieldEnter)(Arena arena);
extern void (ShieldLeave)(Arena arena);
extern void (ShieldExpose)(Arena arena, Seg seg);
extern void (ShieldCover)(Arena arena, Seg seg);
extern void (ShieldSuspend)(Arena arena);
extern void (ShieldResume)(Arena arena);
extern void (ShieldFlush)(Arena arena);
#if defined(THREAD_SINGLE) && defined(PROTECTION_NONE)
#define ShieldRaise(arena, seg, mode) \
BEGIN UNUSED(arena); UNUSED(seg); UNUSED(mode); END
#define ShieldLower(arena, seg, mode) \
BEGIN UNUSED(arena); UNUSED(seg); UNUSED(mode); END
#define ShieldEnter(arena) BEGIN UNUSED(arena); END
#define ShieldLeave(arena) BEGIN UNUSED(arena); END
#define ShieldExpose(arena, seg) \
BEGIN UNUSED(arena); UNUSED(seg); END
#define ShieldCover(arena, seg) \
BEGIN UNUSED(arena); UNUSED(seg); END
#define ShieldSuspend(arena) BEGIN UNUSED(arena); END
#define ShieldResume(arena) BEGIN UNUSED(arena); END
#define ShieldFlush(arena) BEGIN UNUSED(arena); END
#endif
/* Protection Interface
*
* See design.mps.prot for the design of the generic interface including
* the contracts for these functions.
*
* This interface has several different implementations, typically one
* per platform, see impl.c.prot* for the various implementations, and
* design.mps.prot* for the corresponding designs. */
extern void ProtSetup(void);
extern void ProtSet(Addr base, Addr limit, AccessSet mode);
extern void ProtTramp(void **resultReturn, void *(*f)(void *, size_t),
void *p, size_t s);
extern void ProtSync(Arena arena);
extern Bool ProtCanStepInstruction(MutatorFaultContext context);
extern Res ProtStepInstruction(MutatorFaultContext context);
/* Location Dependency -- see impl.c.ld */
extern void LDReset(LD ld, Arena arena);
extern void LDAdd(LD ld, Arena arena, Addr addr);
extern Bool LDIsStale(LD ld, Arena arena, Addr addr);
extern void LDAge(Arena arena, RefSet moved);
extern void LDMerge(LD ld, Arena arena, LD from);
/* Root Interface -- see impl.c.root */
extern Res RootCreateTable(Root *rootReturn, Arena arena,
Rank rank, RootMode mode,
Addr *base, Addr *limit);
extern Res RootCreateTableMasked(Root *rootReturn, Arena arena,
Rank rank, RootMode mode,
Addr *base, Addr *limit,
Word mask);
extern Res RootCreateReg(Root *rootReturn, Arena arena,
Rank rank, Thread thread,
RootScanRegMethod scan,
void *p, size_t s);
extern Res RootCreateFmt(Root *rootReturn, Arena arena,
Rank rank, RootMode mode,
FormatScanMethod scan,
Addr base, Addr limit);
extern Res RootCreateFun(Root *rootReturn, Arena arena,
Rank rank, RootScanMethod scan,
void *p, size_t s);
extern void RootDestroy(Root root);
extern Bool RootModeCheck(RootMode mode);
extern Bool RootCheck(Root root);
extern Res RootDescribe(Root root, mps_lib_FILE *stream);
extern Rank RootRank(Root root);
extern void RootGrey(Root root, Trace trace);
extern Res RootScan(ScanState ss, Root root);
extern Arena RootArena(Root root);
extern Bool RootOfAddr(Root *root, Arena arena, Addr addr);
extern void RootAccess(Root root, AccessSet mode);
extern AccessSet RootPM(Root root);
/* VM Interface -- see impl.c.vm* */
extern Align VMAlign(VM vm);
extern Bool VMCheck(VM vm);
extern Res VMCreate(VM *VMReturn, Size size);
extern void VMDestroy(VM vm);
extern Addr VMBase(VM vm);
extern Addr VMLimit(VM vm);
extern Res VMMap(VM vm, Addr base, Addr limit);
extern void VMUnmap(VM vm, Addr base, Addr limit);
extern Size VMReserved(VM vm);
extern Size VMMapped(VM vm);
/* Stack Probe */
extern void StackProbe(Word depth);
/* STATISTIC -- gather diagnostics (in some varieties)
*
* The argument of STATISTIC is an expression; the expansion followed by
* a semicolon is syntactically a statement.
*
* The argument of STATISTIC_STAT is a statement; the expansion followed by
* a semicolon is syntactically a statement.
*
* STATISTIC_WRITE is inserted in WriteF arguments to output the values
* of diagnostic fields.
*
* .statistic.whitehot: The implementation of STATISTIC for
* non-statistical varieties passes the parameter to DISCARD to ensure
* the parameter is syntactically an expression. The parameter is
* passed as part of a comma-expression so that its type is not
* important. This permits an expression of type void.
*/
#if defined(DIAGNOSTICS)
#define STATISTIC(gather) BEGIN (gather); END
#define STATISTIC_STAT(gather) BEGIN gather; END
#define STATISTIC_WRITE(format, arg) (format), (arg),
#elif defined(DIAGNOSTICS_NONE)
#define STATISTIC(gather) DISCARD(((gather), 0))
#define STATISTIC_STAT(gather) DISCARD_STAT(gather)
#define STATISTIC_WRITE(format, arg)
#else
#error "No diagnostics configured."
#endif
#endif /* mpm_h */
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