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📄 backendid.h(1.1 KB)
📄 barrier.h(674 B)
📄 block.h(3.21 KB)
📄 buf.h(1.06 KB)
📄 buf_internals.h(12.24 KB)
📄 buffile.h(1.67 KB)
📄 bufmgr.h(9 KB)
📄 bufpage.h(14.91 KB)
📄 checksum.h(666 B)
📄 checksum_impl.h(8.59 KB)
📄 copydir.h(561 B)
📄 dsm.h(1.95 KB)
📄 dsm_impl.h(2.12 KB)
📄 fd.h(4.27 KB)
📄 freespace.h(1.36 KB)
📄 fsm_internals.h(2.26 KB)
📄 indexfsm.h(795 B)
📄 ipc.h(2.67 KB)
📄 item.h(469 B)
📄 itemid.h(4.24 KB)
📄 itemptr.h(3.93 KB)
📄 large_object.h(3.6 KB)
📄 latch.h(6.55 KB)
📄 lmgr.h(4.19 KB)
📄 lock.h(22.89 KB)
📄 lockdefs.h(1.86 KB)
📄 lwlock.h(9.19 KB)
📄 lwlocknames.h(2.42 KB)
📄 off.h(1.58 KB)
📄 pg_sema.h(2.39 KB)
📄 pg_shmem.h(2.23 KB)
📄 pmsignal.h(2.1 KB)
📄 pos.h(1.56 KB)
📄 predicate.h(2.56 KB)
📄 predicate_internals.h(16.96 KB)
📄 proc.h(10.81 KB)
📄 procarray.h(3.5 KB)
📄 procsignal.h(1.9 KB)
📄 reinit.h(592 B)
📄 relfilenode.h(3.81 KB)
📄 s_lock.h(28.64 KB)
📄 shm_mq.h(2.59 KB)
📄 shm_toc.h(2.01 KB)
📄 shmem.h(2.63 KB)
📄 sinval.h(5.41 KB)
📄 sinvaladt.h(1.58 KB)
📄 smgr.h(5.96 KB)
📄 spin.h(2.42 KB)
📄 standby.h(3.35 KB)
📄 standbydefs.h(2.25 KB)

Editing: shmem.h

/*-------------------------------------------------------------------------
 *
 * shmem.h
 *	  shared memory management structures
 *
 * Historical note:
 * A long time ago, Postgres' shared memory region was allowed to be mapped
 * at a different address in each process, and shared memory "pointers" were
 * passed around as offsets relative to the start of the shared memory region.
 * That is no longer the case: each process must map the shared memory region
 * at the same address.  This means shared memory pointers can be passed
 * around directly between different processes.
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/storage/shmem.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef SHMEM_H
#define SHMEM_H

#include "utils/hsearch.h"

/* shmqueue.c */
typedef struct SHM_QUEUE
{
	struct SHM_QUEUE *prev;
	struct SHM_QUEUE *next;
} SHM_QUEUE;

/* shmem.c */
extern void InitShmemAccess(void *seghdr);
extern void InitShmemAllocation(void);
extern void *ShmemAlloc(Size size);
extern bool ShmemAddrIsValid(const void *addr);
extern void InitShmemIndex(void);
extern HTAB *ShmemInitHash(const char *name, long init_size, long max_size,
			  HASHCTL *infoP, int hash_flags);
extern void *ShmemInitStruct(const char *name, Size size, bool *foundPtr);
extern Size add_size(Size s1, Size s2);
extern Size mul_size(Size s1, Size s2);

/* ipci.c */
extern void RequestAddinShmemSpace(Size size);

/* size constants for the shmem index table */
 /* max size of data structure string name */
#define SHMEM_INDEX_KEYSIZE		 (48)
 /* estimated size of the shmem index table (not a hard limit) */
#define SHMEM_INDEX_SIZE		 (64)

/* this is a hash bucket in the shmem index table */
typedef struct
{
	char		key[SHMEM_INDEX_KEYSIZE];		/* string name */
	void	   *location;		/* location in shared mem */
	Size		size;			/* # bytes allocated for the structure */
} ShmemIndexEnt;

/*
 * prototypes for functions in shmqueue.c
 */
extern void SHMQueueInit(SHM_QUEUE *queue);
extern void SHMQueueElemInit(SHM_QUEUE *queue);
extern void SHMQueueDelete(SHM_QUEUE *queue);
extern void SHMQueueInsertBefore(SHM_QUEUE *queue, SHM_QUEUE *elem);
extern void SHMQueueInsertAfter(SHM_QUEUE *queue, SHM_QUEUE *elem);
extern Pointer SHMQueueNext(const SHM_QUEUE *queue, const SHM_QUEUE *curElem,
			 Size linkOffset);
extern Pointer SHMQueuePrev(const SHM_QUEUE *queue, const SHM_QUEUE *curElem,
			 Size linkOffset);
extern bool SHMQueueEmpty(const SHM_QUEUE *queue);
extern bool SHMQueueIsDetached(const SHM_QUEUE *queue);

#endif   /* SHMEM_H */

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Editing: shmem.h

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