mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-24 14:30:43 -08:00
353 lines
8.1 KiB
C
353 lines
8.1 KiB
C
/* pooln.c: NULL POOL CLASS
|
|
*
|
|
* $Id$
|
|
* Copyright (c) 2001 Ravenbrook Limited. See end of file for license.
|
|
*/
|
|
|
|
#include "pooln.h"
|
|
#include "mpm.h"
|
|
|
|
SRCID(pooln, "$Id$");
|
|
|
|
|
|
/* PoolNStruct -- the pool structure */
|
|
|
|
typedef struct PoolNStruct {
|
|
PoolStruct poolStruct; /* generic pool structure */
|
|
/* and that's it */
|
|
} PoolNStruct;
|
|
|
|
|
|
/* PoolPoolN -- get the PoolN structure from generic Pool */
|
|
|
|
#define PoolPoolN(pool) PARENT(PoolNStruct, poolStruct, pool)
|
|
|
|
|
|
/* PoolPoolN -- get the generic pool structure from a PoolN */
|
|
|
|
#define PoolNPool(pooln) (&(poolN)->poolStruct)
|
|
|
|
|
|
/* NInit -- init method for class N */
|
|
|
|
static Res NInit(Pool pool, va_list args)
|
|
{
|
|
PoolN poolN = PoolPoolN(pool);
|
|
|
|
UNUSED(args);
|
|
|
|
/* Initialize pool-specific structures. */
|
|
|
|
AVERT(PoolN, poolN);
|
|
EVENT3(PoolInit, pool, PoolArena(pool), ClassOfPool(pool));
|
|
return ResOK;
|
|
}
|
|
|
|
|
|
/* NFinish -- finish method for class N */
|
|
|
|
static void NFinish(Pool pool)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
/* Finish pool-specific structures. */
|
|
}
|
|
|
|
|
|
/* NAlloc -- alloc method for class N */
|
|
|
|
static Res NAlloc(Addr *pReturn, Pool pool, Size size,
|
|
Bool withReservoirPermit)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVER(pReturn != NULL);
|
|
AVER(size > 0);
|
|
AVER(BoolCheck(withReservoirPermit));
|
|
|
|
return ResLIMIT; /* limit of nil blocks exceeded */
|
|
}
|
|
|
|
|
|
/* NFree -- free method for class N */
|
|
|
|
static void NFree(Pool pool, Addr old, Size size)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVER(old != (Addr)0);
|
|
AVER(size > 0);
|
|
|
|
NOTREACHED; /* can't allocate, should never free */
|
|
}
|
|
|
|
|
|
/* NBufferFill -- buffer fill method for class N */
|
|
|
|
static Res NBufferFill(Addr *baseReturn, Addr *limitReturn,
|
|
Pool pool, Buffer buffer, Size size,
|
|
Bool withReservoirPermit)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
AVER(baseReturn != NULL);
|
|
AVER(limitReturn != NULL);
|
|
AVERT(Buffer, buffer);
|
|
AVER(BufferIsReset(buffer));
|
|
AVER(size > 0);
|
|
AVER(BoolCheck(withReservoirPermit));
|
|
|
|
NOTREACHED; /* can't create buffers, so shouldn't fill them */
|
|
return ResUNIMPL;
|
|
}
|
|
|
|
|
|
/* NBufferEmpty -- buffer empty method for class N */
|
|
|
|
static void NBufferEmpty(Pool pool, Buffer buffer,
|
|
Addr init, Addr limit)
|
|
{
|
|
AVERT(Pool, pool);
|
|
AVERT(Buffer, buffer);
|
|
AVER(BufferIsReady(buffer));
|
|
AVER(init <= limit);
|
|
|
|
NOTREACHED; /* can't create buffers, so they shouldn't trip */
|
|
}
|
|
|
|
|
|
/* NDescribe -- describe method for class N */
|
|
|
|
static Res NDescribe(Pool pool, mps_lib_FILE *stream)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
UNUSED(stream); /* TODO: should output something here */
|
|
|
|
return ResOK;
|
|
}
|
|
|
|
|
|
/* NWhiten -- condemn method for class N */
|
|
|
|
static Res NWhiten(Pool pool, Trace trace, Seg seg)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVERT(Trace, trace);
|
|
AVERT(Seg, seg);
|
|
|
|
NOTREACHED; /* pool doesn't have any actions */
|
|
|
|
return ResUNIMPL;
|
|
}
|
|
|
|
|
|
/* NGrey -- greyen method for class N */
|
|
|
|
static void NGrey(Pool pool, Trace trace, Seg seg)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVERT(Trace, trace);
|
|
AVERT(Seg, seg);
|
|
}
|
|
|
|
|
|
/* NBlacken -- blacken method for class N */
|
|
|
|
static void NBlacken(Pool pool, TraceSet traceSet, Seg seg)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVERT(TraceSet, traceSet);
|
|
AVERT(Seg, seg);
|
|
}
|
|
|
|
|
|
/* NScan -- scan method for class N */
|
|
|
|
static Res NScan(Bool *totalReturn, ScanState ss, Pool pool, Seg seg)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVER(totalReturn != NULL);
|
|
AVERT(ScanState, ss);
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
AVERT(Seg, seg);
|
|
|
|
return ResOK;
|
|
}
|
|
|
|
|
|
/* NFix -- fix method for class N */
|
|
|
|
static Res NFix(Pool pool, ScanState ss, Seg seg, Ref *refIO)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVERT(ScanState, ss);
|
|
UNUSED(refIO);
|
|
AVERT(Seg, seg);
|
|
NOTREACHED; /* Since we don't allocate any objects, should never */
|
|
/* be called upon to fix a reference. */
|
|
return ResFAIL;
|
|
}
|
|
|
|
|
|
/* NReclaim -- reclaim method for class N */
|
|
|
|
static void NReclaim(Pool pool, Trace trace, Seg seg)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVERT(Trace, trace);
|
|
AVERT(Seg, seg);
|
|
/* all unmarked and white objects reclaimed */
|
|
}
|
|
|
|
|
|
/* NTraceEnd -- trace end method for class N */
|
|
|
|
static void NTraceEnd(Pool pool, Trace trace)
|
|
{
|
|
PoolN poolN;
|
|
|
|
AVERT(Pool, pool);
|
|
poolN = PoolPoolN(pool);
|
|
AVERT(PoolN, poolN);
|
|
|
|
AVERT(Trace, trace);
|
|
}
|
|
|
|
|
|
/* NPoolClass -- pool class definition for N */
|
|
|
|
DEFINE_POOL_CLASS(NPoolClass, this)
|
|
{
|
|
INHERIT_CLASS(this, AbstractPoolClass);
|
|
this->name = "N";
|
|
this->size = sizeof(PoolNStruct);
|
|
this->offset = offsetof(PoolNStruct, poolStruct);
|
|
this->attr = AttrSCAN | AttrALLOC | AttrFREE | AttrBUF |
|
|
AttrBUF_RESERVE | AttrGC;
|
|
this->init = NInit;
|
|
this->finish = NFinish;
|
|
this->alloc = NAlloc;
|
|
this->free = NFree;
|
|
this->bufferFill = NBufferFill;
|
|
this->bufferEmpty = NBufferEmpty;
|
|
this->whiten = NWhiten;
|
|
this->grey = NGrey;
|
|
this->blacken = NBlacken;
|
|
this->scan = NScan;
|
|
this->fix = NFix;
|
|
this->fixEmergency = NFix;
|
|
this->reclaim = NReclaim;
|
|
this->traceEnd = NTraceEnd;
|
|
this->describe = NDescribe;
|
|
}
|
|
|
|
|
|
/* PoolClassN -- returns the PoolClass for the null pool class */
|
|
|
|
PoolClass PoolClassN(void)
|
|
{
|
|
return EnsureNPoolClass();
|
|
}
|
|
|
|
|
|
/* PoolNCheck -- check a pool of class N */
|
|
|
|
Bool PoolNCheck(PoolN poolN)
|
|
{
|
|
CHECKL(poolN != NULL);
|
|
CHECKD(Pool, &poolN->poolStruct);
|
|
CHECKL(poolN->poolStruct.class == EnsureNPoolClass());
|
|
UNUSED(poolN); /* <code/mpm.c#check.unused> */
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* 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.
|
|
*/
|