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Commit3d05965

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Simplify use of AllocSetContextCreate() wrapper macro.
We can allow this macro to accept either abbreviated or non-abbreviatedallocation parameters by making use of __VA_ARGS__. As noted by AndresFreund, it's unlikely that any compiler would have __builtin_constant_pbut not __VA_ARGS__, so this gives up little or no error checking, andit avoids a minor but annoying API break for extensions.With this change, there is no reason for anybody to callAllocSetContextCreateExtended directly, so in HEAD I renamed it toAllocSetContextCreateInternal. It's probably too late for an ABIbreak like that in 11, though.Discussion:https://postgr.es/m/20181012170355.bhxi273skjt6sag4@alap3.anarazel.de
1 parent355684e commit3d05965

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4 files changed

+20
-19
lines changed

4 files changed

+20
-19
lines changed

‎src/backend/access/transam/xact.c

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -1018,11 +1018,11 @@ AtStart_Memory(void)
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*/
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if (TransactionAbortContext==NULL)
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TransactionAbortContext=
1021-
AllocSetContextCreateExtended(TopMemoryContext,
1022-
"TransactionAbortContext",
1023-
32*1024,
1024-
32*1024,
1025-
32*1024);
1021+
AllocSetContextCreate(TopMemoryContext,
1022+
"TransactionAbortContext",
1023+
32*1024,
1024+
32*1024,
1025+
32*1024);
10261026

10271027
/*
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* We shouldn't have a transaction context already.

‎src/backend/utils/mmgr/aset.c

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -381,8 +381,10 @@ AllocSetFreeIndex(Size size)
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* maxBlockSize: maximum allocation block size
382382
*
383383
* Most callers should abstract the context size parameters using a macro
384-
* such as ALLOCSET_DEFAULT_SIZES. (This is now *required* when going
385-
* through the AllocSetContextCreate macro.)
384+
* such as ALLOCSET_DEFAULT_SIZES.
385+
*
386+
* Note: don't call this directly; go through the wrapper macro
387+
* AllocSetContextCreate.
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*/
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MemoryContext
388390
AllocSetContextCreateExtended(MemoryContextparent,

‎src/backend/utils/mmgr/mcxt.c

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -119,11 +119,11 @@ MemoryContextInit(void)
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* This should be the last step in this function, as elog.c assumes memory
120120
* management works once ErrorContext is non-null.
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*/
122-
ErrorContext=AllocSetContextCreateExtended(TopMemoryContext,
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"ErrorContext",
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8*1024,
125-
8*1024,
126-
8*1024);
122+
ErrorContext=AllocSetContextCreate(TopMemoryContext,
123+
"ErrorContext",
124+
8*1024,
125+
8*1024,
126+
8*1024);
127127
MemoryContextAllowInCriticalSection(ErrorContext, true);
128128
}
129129

‎src/include/utils/memutils.h

Lines changed: 6 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -158,17 +158,16 @@ extern MemoryContext AllocSetContextCreateExtended(MemoryContext parent,
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/*
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* This wrapper macro exists to check for non-constant strings used as context
160160
* names; that's no longer supported. (Use MemoryContextSetIdentifier if you
161-
* want to provide a variable identifier.) Note you must specify block sizes
162-
* with one of the abstraction macros below.
161+
* want to provide a variable identifier.)
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*/
164-
#ifdefHAVE__BUILTIN_CONSTANT_P
165-
#defineAllocSetContextCreate(parent,name,allocparams) \
163+
#if defined(HAVE__BUILTIN_CONSTANT_P)&& defined(HAVE__VA_ARGS)
164+
#defineAllocSetContextCreate(parent,name,...) \
166165
(StaticAssertExpr(__builtin_constant_p(name), \
167166
"memory context names must be constant strings"), \
168-
AllocSetContextCreateExtended(parent, name,allocparams))
167+
AllocSetContextCreateExtended(parent, name,__VA_ARGS__))
169168
#else
170-
#defineAllocSetContextCreate(parent,name,allocparams) \
171-
AllocSetContextCreateExtended(parent, name, allocparams)
169+
#defineAllocSetContextCreate \
170+
AllocSetContextCreateExtended
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#endif
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174173
/* slab.c */

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