/usr/include/postgres-xc/server/gtm/memnodes.h is in postgres-xc-server-dev 1.1-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /*-------------------------------------------------------------------------
*
* memnodes.h
* POSTGRES memory context node definitions.
*
*
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
* Portions Copyright (c) 2010-2012 Postgres-XC Development Group
*
* $PostgreSQL: pgsql/src/include/nodes/memnodes.h,v 1.34 2008/01/01 19:45:58 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef MEMNODES_H
#define MEMNODES_H
#include "gtm/gtm_lock.h"
/*
* MemoryContext
* A logical context in which memory allocations occur.
*
* MemoryContext itself is an abstract type that can have multiple
* implementations, though for now we have only AllocSetContext.
* The function pointers in MemoryContextMethods define one specific
* implementation of MemoryContext --- they are a virtual function table
* in C++ terms.
*
* Note: for largely historical reasons, typedef MemoryContext is a pointer
* to the context struct rather than the struct type itself.
*/
typedef struct MemoryContextMethods
{
void *(*alloc) (MemoryContext context, Size size);
/* call this free_p in case someone #define's free() */
void (*free_p) (MemoryContext context, void *pointer);
void *(*realloc) (MemoryContext context, void *pointer, Size size);
void (*init) (MemoryContext context);
void (*reset) (MemoryContext context);
void (*delete) (MemoryContext context);
Size (*get_chunk_space) (MemoryContext context, void *pointer);
bool (*is_empty) (MemoryContext context);
void (*stats) (MemoryContext context, int level);
#ifdef MEMORY_CONTEXT_CHECKING
void (*check) (MemoryContext context);
#endif
} MemoryContextMethods;
typedef struct MemoryContextData
{
MemoryContextMethods *methods; /* virtual function table */
MemoryContext parent; /* NULL if no parent (toplevel context) */
MemoryContext firstchild; /* head of linked list of children */
MemoryContext nextchild; /* next child of same parent */
char *name; /* context name (just for debugging) */
bool is_shared; /* context is shared by threads */
GTM_RWLock lock; /* lock to protect members if the context is shared */
} MemoryContextData;
#define MemoryContextIsShared(context) \
(((MemoryContextData *)(context))->is_shared)
#define MemoryContextLock(context) \
(GTM_RWLockAcquire(&((MemoryContextData *)(context))->lock, GTM_LOCKMODE_WRITE))
#define MemoryContextUnlock(context) \
(GTM_RWLockRelease(&((MemoryContextData *)(context))->lock))
/*
* MemoryContextIsValid
* True iff memory context is valid.
*
* Add new context types to the set accepted by this macro.
*/
#define MemoryContextIsValid(context) \
((context) != NULL)
#endif /* MEMNODES_H */
|