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611806cd72
Since C99, there can be a trailing comma after the last value in an enum definition. A lot of new code has been introducing this style on the fly. Some new patches are now taking an inconsistent approach to this. Some add the last comma on the fly if they add a new last value, some are trying to preserve the existing style in each place, some are even dropping the last comma if there was one. We could nudge this all in a consistent direction if we just add the trailing commas everywhere once. I omitted a few places where there was a fixed "last" value that will always stay last. I also skipped the header files of libpq and ecpg, in case people want to use those with older compilers. There were also a small number of cases where the enum type wasn't used anywhere (but the enum values were), which ended up confusing pgindent a bit, so I left those alone. Discussion: https://www.postgresql.org/message-id/flat/386f8c45-c8ac-4681-8add-e3b0852c1620%40eisentraut.org
137 lines
5.3 KiB
C
137 lines
5.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* memutils_internal.h
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* This file contains declarations for memory allocation utility
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* functions for internal use.
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*
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*
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* Portions Copyright (c) 2022-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/utils/memutils_internal.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef MEMUTILS_INTERNAL_H
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#define MEMUTILS_INTERNAL_H
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#include "utils/memutils.h"
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/* These functions implement the MemoryContext API for AllocSet context. */
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extern void *AllocSetAlloc(MemoryContext context, Size size);
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extern void AllocSetFree(void *pointer);
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extern void *AllocSetRealloc(void *pointer, Size size);
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extern void AllocSetReset(MemoryContext context);
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extern void AllocSetDelete(MemoryContext context);
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extern MemoryContext AllocSetGetChunkContext(void *pointer);
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extern Size AllocSetGetChunkSpace(void *pointer);
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extern bool AllocSetIsEmpty(MemoryContext context);
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extern void AllocSetStats(MemoryContext context,
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MemoryStatsPrintFunc printfunc, void *passthru,
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MemoryContextCounters *totals,
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bool print_to_stderr);
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#ifdef MEMORY_CONTEXT_CHECKING
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extern void AllocSetCheck(MemoryContext context);
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#endif
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/* These functions implement the MemoryContext API for Generation context. */
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extern void *GenerationAlloc(MemoryContext context, Size size);
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extern void GenerationFree(void *pointer);
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extern void *GenerationRealloc(void *pointer, Size size);
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extern void GenerationReset(MemoryContext context);
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extern void GenerationDelete(MemoryContext context);
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extern MemoryContext GenerationGetChunkContext(void *pointer);
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extern Size GenerationGetChunkSpace(void *pointer);
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extern bool GenerationIsEmpty(MemoryContext context);
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extern void GenerationStats(MemoryContext context,
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MemoryStatsPrintFunc printfunc, void *passthru,
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MemoryContextCounters *totals,
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bool print_to_stderr);
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#ifdef MEMORY_CONTEXT_CHECKING
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extern void GenerationCheck(MemoryContext context);
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#endif
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/* These functions implement the MemoryContext API for Slab context. */
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extern void *SlabAlloc(MemoryContext context, Size size);
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extern void SlabFree(void *pointer);
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extern void *SlabRealloc(void *pointer, Size size);
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extern void SlabReset(MemoryContext context);
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extern void SlabDelete(MemoryContext context);
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extern MemoryContext SlabGetChunkContext(void *pointer);
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extern Size SlabGetChunkSpace(void *pointer);
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extern bool SlabIsEmpty(MemoryContext context);
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extern void SlabStats(MemoryContext context,
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MemoryStatsPrintFunc printfunc, void *passthru,
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MemoryContextCounters *totals,
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bool print_to_stderr);
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#ifdef MEMORY_CONTEXT_CHECKING
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extern void SlabCheck(MemoryContext context);
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#endif
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/*
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* These functions support the implementation of palloc_aligned() and are not
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* part of a fully-fledged MemoryContext type.
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*/
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extern void AlignedAllocFree(void *pointer);
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extern void *AlignedAllocRealloc(void *pointer, Size size);
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extern MemoryContext AlignedAllocGetChunkContext(void *pointer);
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extern Size AlignedAllocGetChunkSpace(void *pointer);
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/*
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* How many extra bytes do we need to request in order to ensure that we can
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* align a pointer to 'alignto'. Since palloc'd pointers are already aligned
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* to MAXIMUM_ALIGNOF we can subtract that amount. We also need to make sure
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* there is enough space for the redirection MemoryChunk.
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*/
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#define PallocAlignedExtraBytes(alignto) \
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((alignto) + (sizeof(MemoryChunk) - MAXIMUM_ALIGNOF))
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/*
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* MemoryContextMethodID
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* A unique identifier for each MemoryContext implementation which
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* indicates the index into the mcxt_methods[] array. See mcxt.c.
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*
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* For robust error detection, ensure that MemoryContextMethodID has a value
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* for each possible bit-pattern of MEMORY_CONTEXT_METHODID_MASK, and make
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* dummy entries for unused IDs in the mcxt_methods[] array. We also try
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* to avoid using bit-patterns as valid IDs if they are likely to occur in
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* garbage data, or if they could falsely match on chunks that are really from
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* malloc not palloc. (We can't tell that for most malloc implementations,
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* but it happens that glibc stores flag bits in the same place where we put
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* the MemoryContextMethodID, so the possible values are predictable for it.)
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*/
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typedef enum MemoryContextMethodID
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{
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MCTX_UNUSED1_ID, /* 000 occurs in never-used memory */
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MCTX_UNUSED2_ID, /* glibc malloc'd chunks usually match 001 */
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MCTX_UNUSED3_ID, /* glibc malloc'd chunks > 128kB match 010 */
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MCTX_ASET_ID,
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MCTX_GENERATION_ID,
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MCTX_SLAB_ID,
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MCTX_ALIGNED_REDIRECT_ID,
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MCTX_UNUSED4_ID, /* 111 occurs in wipe_mem'd memory */
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} MemoryContextMethodID;
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/*
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* The number of bits that 8-byte memory chunk headers can use to encode the
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* MemoryContextMethodID.
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*/
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#define MEMORY_CONTEXT_METHODID_BITS 3
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#define MEMORY_CONTEXT_METHODID_MASK \
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((((uint64) 1) << MEMORY_CONTEXT_METHODID_BITS) - 1)
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/*
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* This routine handles the context-type-independent part of memory
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* context creation. It's intended to be called from context-type-
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* specific creation routines, and noplace else.
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*/
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extern void MemoryContextCreate(MemoryContext node,
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NodeTag tag,
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MemoryContextMethodID method_id,
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MemoryContext parent,
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const char *name);
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#endif /* MEMUTILS_INTERNAL_H */
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