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Commitb23aeb6

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Cleanup for pull-up-isReset patch.
Clear isReset before, not after, calling the context-specific alloc method,so as to preserve the option to do a tail call in MemoryContextAlloc(and also so this code isn't assuming that a failed alloc call won't havechanged the context's state before failing). Fix missed direct invocationof reset method. Reformat a comment.
1 parent11c08c3 commitb23aeb6

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2 files changed

+12
-11
lines changed

2 files changed

+12
-11
lines changed

‎src/backend/utils/mmgr/aset.c

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -128,11 +128,11 @@ typedef void *AllocPointer;
128128
/*
129129
* AllocSetContext is our standard implementation of MemoryContext.
130130
*
131-
* Note: header.isReset means there is nothing for AllocSetReset to do. This is
132-
* different from the aset being physically empty (empty blocks list) because
133-
* we may still have a keeper block. It's also different from the set being
134-
* logically empty, because we don't attempt to detect pfree'ing the last
135-
* active chunk.
131+
* Note: header.isReset means there is nothing for AllocSetReset to do.
132+
*This isdifferent from the aset being physically empty (empty blocks list)
133+
*becausewe may still have a keeper block. It's also different from the set
134+
*beinglogically empty, because we don't attempt to detect pfree'ing the
135+
*lastactive chunk.
136136
*/
137137
typedefstructAllocSetContext
138138
{

‎src/backend/utils/mmgr/mcxt.c

Lines changed: 7 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -234,7 +234,7 @@ MemoryContextResetAndDeleteChildren(MemoryContext context)
234234
AssertArg(MemoryContextIsValid(context));
235235

236236
MemoryContextDeleteChildren(context);
237-
(*context->methods->reset)(context);
237+
MemoryContextReset(context);
238238
}
239239

240240
/*
@@ -510,16 +510,15 @@ MemoryContextCreate(NodeTag tag, Size size,
510510
void*
511511
MemoryContextAlloc(MemoryContextcontext,Sizesize)
512512
{
513-
void*ret;
514513
AssertArg(MemoryContextIsValid(context));
515514

516515
if (!AllocSizeIsValid(size))
517516
elog(ERROR,"invalid memory alloc request size %lu",
518517
(unsigned long)size);
519518

520-
ret= (*context->methods->alloc) (context,size);
521519
context->isReset= false;
522-
returnret;
520+
521+
return (*context->methods->alloc) (context,size);
523522
}
524523

525524
/*
@@ -540,11 +539,12 @@ MemoryContextAllocZero(MemoryContext context, Size size)
540539
elog(ERROR,"invalid memory alloc request size %lu",
541540
(unsigned long)size);
542541

542+
context->isReset= false;
543+
543544
ret= (*context->methods->alloc) (context,size);
544545

545546
MemSetAligned(ret,0,size);
546547

547-
context->isReset= false;
548548
returnret;
549549
}
550550

@@ -566,11 +566,12 @@ MemoryContextAllocZeroAligned(MemoryContext context, Size size)
566566
elog(ERROR,"invalid memory alloc request size %lu",
567567
(unsigned long)size);
568568

569+
context->isReset= false;
570+
569571
ret= (*context->methods->alloc) (context,size);
570572

571573
MemSetLoop(ret,0,size);
572574

573-
context->isReset= false;
574575
returnret;
575576
}
576577

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